diff --git a/core/lib/Drupal/Core/Extension/UpdateModuleHandler.php b/core/lib/Drupal/Core/Extension/UpdateModuleHandler.php
index 9b3c0ea..595bc0f 100644
--- a/core/lib/Drupal/Core/Extension/UpdateModuleHandler.php
+++ b/core/lib/Drupal/Core/Extension/UpdateModuleHandler.php
@@ -30,20 +30,24 @@ public function getImplementations($hook) {
       // Allow logging.
       case 'watchdog':
         return parent::getImplementations($hook);
+
       // Forms and pages do not render without the basic elements defined in
       // system_element_info().
       case 'element_info':
-        return array('system');
       // Forms do not render without the basic elements in
       // drupal_common_theme() called from system_theme().
       case 'theme':
+        return array('system');
+
       // This is called during rebuild to find testing themes.
       case 'system_theme_info':
         return array();
+
       // t() (called indirectly by \Drupal\Core\StreamWrapper\PublicStream)
       // needs this. Other schema calls aren't supported.
       case 'schema':
         return array('locale');
+
       default:
         throw new \LogicException("Invoking hooks $hook is not supported during updates");
     }