Merge branch '4.1' into 4.2

* 4.1:
  [Twig] Replace for-loops with blocks for attributes
  fixed CS
  [Tests] Change to willThrowException
  [Console] fix PHPDoc in Command
  Update FileLoaderLoadException.php
  Fix wrong calls to clearstatcache
  Add Vietnamese translation for validators
  Allow running PHPUnit with "xdebug.scream" ON
  [VarDumper] Add descriptors tests
  [Yaml] detect circular references
  [DI] fix reporting bindings on overriden services as unused
  [Routing] minor fix or previous PR

Author: nicolas-grekas

Tests/DataCollector/MessengerDataCollectorTest.php

@@ -80,7 +80,7 @@ public function testHandleWithException()
         $message = new DummyMessage('dummy message');
 
         $bus = $this->getMockBuilder(MessageBusInterface::class)->getMock();
-        $bus->method('dispatch')->with($message)->will($this->throwException(new \RuntimeException('foo')));
+        $bus->method('dispatch')->with($message)->willThrowException(new \RuntimeException('foo'));
         $bus = new TraceableMessageBus($bus);
 
         $collector = new MessengerDataCollector();

Tests/TraceableMessageBusTest.php

@@ -70,7 +70,7 @@ public function testItTracesExceptions()
         $message = new DummyMessage('Hello');
 
         $bus = $this->getMockBuilder(MessageBusInterface::class)->getMock();
-        $bus->expects($this->once())->method('dispatch')->with($message)->will($this->throwException($exception = new \RuntimeException('Meh.')));
+        $bus->expects($this->once())->method('dispatch')->with($message)->willThrowException($exception = new \RuntimeException('Meh.'));
 
         $traceableBus = new TraceableMessageBus($bus);