Merge branch '2.7' into 2.8

* 2.7:
  fixed typo
  Revert "fixed typo"
  fixed typo
  fixed CS
  Avoid setting request attributes from signature arguments in AnnotationClassLoader
  [DependencyInjection] Add some missing typehints in YamlFileLoader
  [DependencyInjection] minor: Fix a DocBlock
  [HttpKernel] Give higher priority to adding request formats
  [FrameworkBundle] Fix third level headers for MarkdownDescriptor
  [TwigBundle] do not lose already set method calls
  #20411 fix Yaml parsing for very long quoted strings
  CS: apply is_null
  DX: remove invalid inheritdoc
  bumped Symfony version to 2.7.24
  updated VERSION for 2.7.23
  update CONTRIBUTORS for 2.7.23
  updated CHANGELOG for 2.7.23
  [FrameworkBundle] Skip test if xdebug.file_link_format is defined.

Author: fabpot

EventListener/AddRequestFormatsListener.php

@@ -52,6 +52,6 @@ public function onKernelRequest(GetResponseEvent $event)
      */
     public static function getSubscribedEvents()
     {
-        return array(KernelEvents::REQUEST => 'onKernelRequest');
+        return array(KernelEvents::REQUEST => array('onKernelRequest', 1));
     }
 }

Tests/EventListener/AddRequestFormatsListenerTest.php

@@ -45,7 +45,7 @@ public function testIsAnEventSubscriber()
     public function testRegisteredEvent()
     {
         $this->assertEquals(
-            array(KernelEvents::REQUEST => 'onKernelRequest'),
+            array(KernelEvents::REQUEST => array('onKernelRequest', 1)),
             AddRequestFormatsListener::getSubscribedEvents()
         );
     }