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

core/modules/content_translation/src/Controller/ContentTranslationController.php

@@ -77,8 +77,8 @@ class ContentTranslationController extends ControllerBase {
    *   The route match.
    * @param string $entity_type_id
    *   (optional) The entity type ID.
-   * @return array Array of page elements to render.
-   * Array of page elements to render.
+   * @return array
+   *   Array of page elements to render.
    */
   public function overview(RouteMatchInterface $route_match, $entity_type_id = NULL) {
     /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */