Merge branch '2.7' into 2.8

* 2.7:
  Increase the inlining YAML level for config:debug
  [Serializer] Minor: fix CS and PHPDoc
  [Form] fix tests
  [Serializer] Ensure that groups are strings
  [Debug] Tell that the extension is for PHP 5 only
  Static code analysis
  Update AnnotationDirectoryLoader.php
  added a test
  Escape the delimiter in Glob::toRegex
  [FrameworkBundle] Fix template location for PHP templates
  [FrameworkBundle] Add path verification to the template parsing test cases

Author: fabpot

Dumper/PhpFileDumper.php

@@ -35,9 +35,7 @@ protected function format(MessageCatalogue $messages, $domain)
      */
     public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
     {
-        $output = "<?php\n\nreturn ".var_export($messages->all($domain), true).";\n";
-
-        return $output;
+        return "<?php\n\nreturn ".var_export($messages->all($domain), true).";\n";
     }
 
     /**