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

Matcher/Dumper/StaticPrefixCollection.php

@@ -106,7 +106,7 @@ public function addRoute($prefix, $route)
      * @param string                       $prefix
      * @param mixed                        $route
      *
-     * @return null|StaticPrefixCollection
+     * @return StaticPrefixCollection|null
      */
     private function groupWithItem($item, $prefix, $route)
     {

Route.php

@@ -29,7 +29,7 @@ class Route implements \Serializable
     private $condition = '';
 
     /**
-     * @var null|CompiledRoute
+     * @var CompiledRoute|null
      */
     private $compiled;