diff -u b/core/modules/system/system.install b/core/modules/system/system.install
--- b/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -450,12 +450,12 @@
     }
     $requirements['cron']['description'][] = [
       '#markup' => t('You can <a href="@cron">run cron manually</a>.', ['@cron' => \Drupal::url('system.run_cron')]),
-      '#weight' => 2
+      '#weight' => 2,
     ];
     $requirements['cron']['description'][] = [
       '#prefix' => '<br />',
       '#markup' => t('To run cron from outside the site, go to <a href="@cron">@cron</a>', ['@cron' => \Drupal::url('system.cron', ['key' => \Drupal::state()->get('system.cron_key'), ['absolute' => TRUE]])]),
-      '#weight' => 3
+      '#weight' => 3,
     ];
   }
   if ($phase != 'install') {