migrate_drupal_ui.module

<?php

/**
 * @file
 * Alert administrators before starting the import process.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function migrate_drupal_ui_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.migrate_drupal_ui':
      $output = '<p>' . t('The Drupal Upgrade UI module provides a one-click upgrade from an earlier version of Drupal. For details, see the <a href=":migrate">online documentation for the Drupal Upgrade UI module</a> in the handbook on upgrading from previous versions.', [':migrate' => 'https://www.drupal.org/upgrade/migrate']) . '</p>';
      return $output;
  }
}