Merge branch '4.2'

* 4.2:
  [Twig] Remove spaces to fix whitespace in tags
  [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
  [Cache] fix bad optim
  [Yaml] detect circular references
  [DI] fix reporting bindings on overriden services as unused
  [Routing] minor fix or previous PR

Author: nicolas-grekas

Tests/FinderTest.php

@@ -1209,7 +1209,7 @@ public function testAccessDeniedException()
 
         // restore original permissions
         chmod($testDir, 0777);
-        clearstatcache($testDir);
+        clearstatcache(true, $testDir);
 
         if ($couldRead) {
             $this->markTestSkipped('could read test files while test requires unreadable');
@@ -1248,7 +1248,7 @@ public function testIgnoredAccessDeniedException()
 
         // restore original permissions
         chmod($testDir, 0777);
-        clearstatcache($testDir);
+        clearstatcache(true, $testDir);
 
         if ($couldRead) {
             $this->markTestSkipped('could read test files while test requires unreadable');