Issue #2081197 by smiro: Remove Unused local variable $links from /core/modules/hal/lib/Drupal/hal/Normalizer/EntityNormalizer.php.

Issue #2080571 by mrsinguyen: Remove Unused local variable $id from /core/modules/comment/lib/Drupal/comment/Entity/Comment.php

Issue #2080069 by mrsinguyen: Remove Unused local variable $stripe from /core/modules/system/system.admin.inc.

Issue #2060119 by tidrif, undertext, damiankloip: Convert FieldPluginBase constants to class constants.

Issue #2051097 by dawehner, Manuel Garcia, tlattimore, neclimdul: Change 'pattern' to 'path' in *.routing.yml files.

Issue #1939082 by shanethehat, larowlan, jenlampton, Cottser, LewisNyman, duellj, Mark Carver, joelpittet: Convert theme_status_messages() to Twig.

Issue #1614186 by RobLoach, tim.plunkett, msonnabaum, Crell, jhodgdon, Niklas Fiekas: Update coding standards for using 'native' PHP classes like stdClass in namespaced code.

Issue #1981368 by tim.plunkett, Crell, webchick: Convert all routes to 'module_name().foo_bar()' naming convention.

Issue #2041333 by tstoeckler, tim.plunkett: Inject the module handler into the entity access controller.

Issue #1987816 by pdrake, disasm, ParisLiakos, pguillard, vijaycs85, dawehner: Convert system_batch_page() to a new style controller.

Issue #1987624 by disasm, robeano, piyuesh23, dawehner | vijaycs85: Convert batch_test() page callbacks to a new style controller.

Issue #1987598 by disasm, mparker17, Niklas Fiekas, rabellamy | vijaycs85: Convert aggregator_test_feed() and aggregator_test_redirect() to a new style controller.

Issue #1945390 by Alan Evans, disasm, tim.plunkett, dawehner: Convert book_admin_edit() to a new-style FormInterface implementation.

Issue #1946466 by tim.plunkett, andypost, jibran, Unitoch, Crell, disasm | mtift: Convert all confirm_form() in user.module and user.pages.inc to the new form interface and convert route.

Issue #1974408 by kim.pepper, disasm, ParisLiakos, kshama_deshmukh, alexpott, theMusician, pwieck | mtift: Convert aggregator_page_source() to a Controller.

Issue #2003592 by andypost, mhagedon, webflo: Convert language_admin_add_form() and language_admin_edit_form() to a Controllers.

Issue #1987656 by mparker17: Convert common_test_js_and_css_querystring() to a new style controller.

Issue #1987572 by mrded, vijaycs85, Sean Buscay: Convert session_test() callbacks to a new style controller.

Issue #1979038 by dawehner, effulgentsia, tstoeckler: Convert views_ajax_autocomplete_taxonomy() to a Controller.

Issue #2084339 by alexpott: Fixed The configuration value system.maintenance.enabled should be moved to the state system.

Issue #2086447 by tim.plunkett, damiankloip: Remove 'View:' prefix from views block derivative admin labels.

Issue #2078285 followup by tim.plunkett: Fixed Add short-cut methods to the \Drupal class for generating URLs and links from routes.

Issue #1203886 by catch, sun, David_Rothstein, RobLoach, tim.plunkett, greggles, alexpott, DamienMcKenna: Remove the PHP module from Drupal core

Issue #2062573 by claudiu.cristea, tim.plunkett, Xano: Change notice: Add method defaultConfiguration() in ConfigurablePluginInterface.

Revert "Issue #2062573 by claudiu.cristea, tim.plunkett, Xano: Add method defaultConfiguration() in ConfigurablePluginInterface."

This reverts commit bf37effc.