diff --git a/core/lib/Drupal/Core/Theme/Registry.php b/core/lib/Drupal/Core/Theme/Registry.php
index 4417615..929fe49 100644
--- a/core/lib/Drupal/Core/Theme/Registry.php
+++ b/core/lib/Drupal/Core/Theme/Registry.php
@@ -514,14 +514,14 @@ protected function processExtension(array &$cache, $name, $type, $theme, $path)
           $result[$hook]['template lineage'] = $cache[$hook]['template lineage'];
         }
         else {
-          $result[$hook]['template lineage'] = array();
+          $result[$hook]['template lineage'] = [];
         }
         if (isset($result[$hook]['template'])) {
-          $result[$hook]['template lineage'][] = array(
+          $result[$hook]['template lineage'][] = [
             'extension' => $theme,
             'template' => $result[$hook]['template'],
             'path' => $result[$hook]['path'],
-          );
+          ];
         }
 
         // If the default keys are not set, use the default values registered