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

core/lib/Drupal/Core/StreamWrapper/LocalStream.php

@@ -567,4 +567,5 @@ abstract class LocalStream implements StreamWrapperInterface {
     // have a return value.
     return TRUE;
   }
+
 }

core/lib/Drupal/Core/StreamWrapper/TemporaryStream.php

@@ -47,4 +47,5 @@ class TemporaryStream extends LocalStream {
     $path = str_replace('\\', '/', $this->getTarget());
     return Url::fromRoute('system.temporary', [], ['absolute' => TRUE, 'query' => ['file' => $path]])->toString();
   }
+
 }