Update to Drupal 8.1.2. For more information, see https://www.drupal.org/project/drupal/releases/8.1.2

core/modules/file/src/FileUsage/FileUsageInterface.php

@@ -64,7 +64,7 @@ interface FileUsageInterface {
    *   A nested array with usage data. The first level is keyed by module name,
    *   the second by object type and the third by the object id. The value of
    *   the third level contains the usage count.
-   *
    */
   public function listUsage(FileInterface $file);
+
 }