Merge branch '3.3' into 3.4

* 3.3:
  Fix race condition in tests between cache and lock
  Improved how links are displayed in exception messages

Author: nicolas-grekas

src/Symfony/Bundle/TwigBundle/Resources/views/exception.css.twig

@@ -84,8 +84,8 @@ header .container { display: flex; justify-content: space-between; }
 .exception-message { flex-grow: 1; }
 .exception-message, .exception-message a { color: #FFF; font-size: 21px; font-weight: 400; margin: 0; }
 .exception-message.long { font-size: 18px; }
-.exception-message a { text-decoration: none; }
-.exception-message a:hover { text-decoration: underline; }
+.exception-message a { border-bottom: 1px solid rgba(255, 255, 255, 0.5); font-size: inherit; text-decoration: none; }
+.exception-message a:hover { border-bottom-color: #ffffff; }
 
 .exception-illustration { flex-basis: 111px; flex-shrink: 0; height: 66px; margin-left: 15px; opacity: .7; }
 

src/Symfony/Component/Cache/Tests/Adapter/AbstractRedisAdapterTest.php

@@ -41,7 +41,6 @@ public static function setupBeforeClass()
 
     public static function tearDownAfterClass()
     {
-        self::$redis->flushDB();
         self::$redis = null;
     }
 }

src/Symfony/Component/Cache/Tests/Adapter/PredisClusterAdapterTest.php

@@ -21,7 +21,6 @@ public static function setupBeforeClass()
 
     public static function tearDownAfterClass()
     {
-        self::$redis->getConnection()->getConnectionByKey('foo')->executeCommand(self::$redis->createCommand('FLUSHDB'));
         self::$redis = null;
     }
 }

src/Symfony/Component/Cache/Tests/Simple/AbstractRedisCacheTest.php

@@ -41,7 +41,6 @@ public static function setupBeforeClass()
 
     public static function tearDownAfterClass()
     {
-        self::$redis->flushDB();
         self::$redis = null;
     }
 }

src/Symfony/Component/Debug/ExceptionHandler.php

@@ -310,8 +310,8 @@ public function getStylesheet(FlattenException $exception)
             .exception-message { flex-grow: 1; padding: 30px 0; }
             .exception-message, .exception-message a { color: #FFF; font-size: 21px; font-weight: 400; margin: 0; }
             .exception-message.long { font-size: 18px; }
-            .exception-message a { text-decoration: none; }
-            .exception-message a:hover { text-decoration: underline; }
+            .exception-message a { border-bottom: 1px solid rgba(255, 255, 255, 0.5); font-size: inherit; text-decoration: none; }
+            .exception-message a:hover { border-bottom-color: #ffffff; }
 
             .exception-illustration { flex-basis: 111px; flex-shrink: 0; height: 66px; margin-left: 15px; opacity: .7; }