Merge branch '2.8' into 3.4

* 2.8:
  Remove duplicate condition
  fix useless space in docblock
  remove unneeded tearDown method
  [FrameworkBundle] Fix broken exception message
  Revert "fixed CS"
  Skip empty proxy code
  [Security] Fix "exclude-from-classmap"
  add missing double-quotes to extra_fields output message
  Convert InsufficientAuthenticationException to HttpException

Author: nicolas-grekas

Command/TranslationUpdateCommand.php

@@ -195,7 +195,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 $currentName = $transPaths[0];
 
                 if (!is_dir($transPaths[0])) {
-                    throw new InvalidArgumentException(sprintf('<error>"%s" is neither an enabled bundle nor a directory.</error>', $transPaths[0]));
+                    throw new InvalidArgumentException(sprintf('"%s" is neither an enabled bundle nor a directory.', $transPaths[0]));
                 }
             }
         }