diff --git a/core/lib/Drupal/Core/Render/theme.api.php b/core/lib/Drupal/Core/Render/theme.api.php
index e547fac7bf9..a67c53299b4 100644
--- a/core/lib/Drupal/Core/Render/theme.api.php
+++ b/core/lib/Drupal/Core/Render/theme.api.php
@@ -1251,13 +1251,29 @@ function hook_page_bottom(array &$page_bottom) {
 function hook_theme($existing, $type, $theme, $path) {
   return [
     'my_module_display' => [
-      'variables' => ['my_modules' => NULL, 'topics' => NULL, 'parents' => NULL, 'tid' => NULL, 'sortby' => NULL, 'my_module_per_page' => NULL],
+      'variables' => [
+        'my_modules' => NULL,
+        'topics' => NULL,
+        'parents' => NULL,
+        'tid' => NULL,
+        'sortby' => NULL,
+        'my_module_per_page' => NULL,
+      ],
     ],
     'my_module_list' => [
-      'variables' => ['my_modules' => NULL, 'parents' => NULL, 'tid' => NULL],
+      'variables' => [
+        'my_modules' => NULL,
+        'parents' => NULL,
+        'tid' => NULL,
+      ],
     ],
     'my_module_icon' => [
-      'variables' => ['new_posts' => NULL, 'num_posts' => 0, 'comment_mode' => 0, 'sticky' => 0],
+      'variables' => [
+        'new_posts' => NULL,
+        'num_posts' => 0,
+        'comment_mode' => 0,
+        'sticky' => 0,
+      ],
     ],
     'status_report' => [
       'render element' => 'requirements',