Merge branch '2.8' into 3.4

* 2.8:
  [php_cs] disable fopen_flags
  [CS] Remove unused variables passed to closures
  [CS] Remove empty comment
  [CS] Enforces null type hint on last position in phpDocs
  [CS] Use combined assignment operators when possible
  Fix a typo in error messages
  [Console] Add missing null to input values allowed types
  [PHPUnitBridge] Fix microtime() format
  bumped Symfony version to 2.8.47
  update CONTRIBUTORS for 2.8.46
  updated VERSION for 2.8.46
  updated CHANGELOG for 2.8.46

Author: nicolas-grekas

Tests/FilesystemTestCase.php

@@ -31,12 +31,12 @@ class FilesystemTestCase extends TestCase
     protected $workspace = null;
 
     /**
-     * @var null|bool Flag for hard links on Windows
+     * @var bool|null Flag for hard links on Windows
      */
     private static $linkOnWindows = null;
 
     /**
-     * @var null|bool Flag for symbolic links on Windows
+     * @var bool|null Flag for symbolic links on Windows
      */
     private static $symlinkOnWindows = null;