Update to Drupal 8.1.5. For more information, see https://www.drupal.org/project/drupal/releases/8.1.5

core/modules/system/src/Controller/AdminController.php

@@ -13,7 +13,7 @@ class AdminController extends ControllerBase {
    * Prints a listing of admin tasks, organized by module.
    *
    * @return array
-   *  A render array containing the listing.
+   *   A render array containing the listing.
    */
   public function index() {
     $module_info = system_get_info('module');