Merge branch '4.4' into 5.4

* 4.4:
  Allow ErrorHandler ^5.0 to be used in HttpKernel
  Fix typo

Tests/Fragment/InlineFragmentRendererTest.php

@@ -155,7 +155,7 @@ public function testExceptionInSubRequestsDoesNotMangleOutputBuffers()
         $this->assertEquals('Foo', ob_get_clean());
     }
 
-    public function testLocaleAndFormatAreIsKeptInSubrequest()
+    public function testLocaleAndFormatAreKeptInSubrequest()
     {
         $expectedSubRequest = Request::create('/');
         $expectedSubRequest->attributes->set('_format', 'foo');