diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 13ab11b..02916fe 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -40,7 +40,7 @@ function block_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<dd>' . t('If the <em>Custom Block</em> module is installed, you can create and add your own blocks using fields and customizable display settings. For more information, see the <a href="!blockcontent-help">Custom Block help page</a>.', array('!blockcontent-help' => $block_content)) . '</dd>';
       $output .= '</dl>';
       return $output;
-    
+
     case 'block.admin_display':
     case 'block.admin_display_theme':
       $demo_theme = $route_match->getParameter('theme') ?: \Drupal::config('system.theme')->get('default');
diff --git a/core/modules/block/js/block.admin.js b/core/modules/block/js/block.admin.js
index 79a522f..1dd26f9 100644
--- a/core/modules/block/js/block.admin.js
+++ b/core/modules/block/js/block.admin.js
@@ -19,7 +19,7 @@
   Drupal.behaviors.blockFilterByText = {
     attach: function (context, settings) {
       var $input = $('input.block-filter-text').once('block-filter-text');
-      var $table = $($input.attr('data-element'));;
+      var $table = $($input.attr('data-element'));
       var $filter_rows;
 
       function filterBlockList(e) {
@@ -28,8 +28,8 @@
         /**
          * Shows or hides the block entry based on the query.
          *
-         * @param {number} index
-         * @param {HTMLElement} label
+         * @param {number} index The index of the block.
+         * @param {HTMLElement} label The label of the block.
          */
         function showBlockEntry(index, label) {
           var $label = $(label);
@@ -43,7 +43,7 @@
           $filter_rows.each(showBlockEntry);
         }
         else {
-          $filter_rows.each(function(index) {
+          $filter_rows.each(function (index) {
             $(this).parent().parent().show();
           });
         }
diff --git a/core/modules/block/src/Controller/BlockListController.php b/core/modules/block/src/Controller/BlockListController.php
index 3c674eb..0d70b69 100644
--- a/core/modules/block/src/Controller/BlockListController.php
+++ b/core/modules/block/src/Controller/BlockListController.php
@@ -76,7 +76,7 @@ public function layout($theme) {
       ['data' => $this->t('Category'), 'field' => 'category', 'sort' => 'asc'],
       ['data' => $this->t('Operations')],
     ];
-    
+
     // Only add blocks which work without any available context.
     $definitions = $this->blockManager->getDefinitionsForContexts();
     // Do not display the 'broken' plugin in the UI.
diff --git a/core/modules/block_content/src/Controller/BlockContentController.php b/core/modules/block_content/src/Controller/BlockContentController.php
index bceb220..6e3ae86 100644
--- a/core/modules/block_content/src/Controller/BlockContentController.php
+++ b/core/modules/block_content/src/Controller/BlockContentController.php
@@ -111,9 +111,9 @@ public function addForm(BlockContentTypeInterface $block_content_type, Request $
       'type' => $block_content_type->id()
     ));
     if (($theme = $request->query->get('theme')) && in_array($theme, array_keys($this->themeHandler->listInfo()))) {
-      // We have navigated to this page from the block listing and will keep track
-      // of the theme for redirecting the user to the configuration page for the
-      // newly created block in the given theme.
+      // We have navigated to this page from the block listing and will keep
+      // track of the theme for redirecting the user to the configuration page
+      // for the newly created block in the given theme.
       $block->setTheme($theme);
     }
     return $this->entityFormBuilder()->getForm($block);