Merge branch '4.4' into 5.2

* 4.4:
  [CS] Replace easy occurences of ?: with ??

Author: derrabus

Controller/ArgumentResolver.php

@@ -36,7 +36,7 @@ final class ArgumentResolver implements ArgumentResolverInterface
 
     public function __construct(ArgumentMetadataFactoryInterface $argumentMetadataFactory = null, iterable $argumentValueResolvers = [])
     {
-        $this->argumentMetadataFactory = $argumentMetadataFactory ?: new ArgumentMetadataFactory();
+        $this->argumentMetadataFactory = $argumentMetadataFactory ?? new ArgumentMetadataFactory();
         $this->argumentValueResolvers = $argumentValueResolvers ?: self::getDefaultArgumentValueResolvers();
     }
 

HttpKernel.php

@@ -60,7 +60,7 @@ public function __construct(EventDispatcherInterface $dispatcher, ControllerReso
     {
         $this->dispatcher = $dispatcher;
         $this->resolver = $resolver;
-        $this->requestStack = $requestStack ?: new RequestStack();
+        $this->requestStack = $requestStack ?? new RequestStack();
         $this->argumentResolver = $argumentResolver;
 
         if (null === $this->argumentResolver) {

Tests/EventListener/TestSessionListenerTest.php

@@ -158,7 +158,7 @@ public function testDoesNotThrowIfRequestDoesNotHaveASession()
     private function filterResponse(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, Response $response = null)
     {
         $request->setSession($this->session);
-        $response = $response ?: new Response();
+        $response = $response ?? new Response();
         $kernel = $this->createMock(HttpKernelInterface::class);
         $event = new ResponseEvent($kernel, $request, $type, $response);