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

core/lib/Drupal/Component/Uuid/Com.php

@@ -15,4 +15,5 @@ class Com implements UuidInterface {
     // Remove {} wrapper and make lower case to keep result consistent.
     return strtolower(trim(com_create_guid(), '{}'));
   }
+
 }

core/lib/Drupal/Component/Uuid/Pecl.php

@@ -13,4 +13,5 @@ class Pecl implements UuidInterface {
   public function generate() {
     return uuid_create(UUID_TYPE_DEFAULT);
   }
+
 }

core/lib/Drupal/Component/Uuid/UuidInterface.php

@@ -14,4 +14,5 @@ interface UuidInterface {
    *   A 16 byte integer represented as a hex string formatted with 4 hyphens.
    */
   public function generate();
+
 }