Merge pull request #3758 from qw3rtman/follow-symfony-coding-standards

Conform with Symfony Coding Standards

src/Composer/Console/HtmlOutputFormatter.php

@@ -83,6 +83,6 @@ class HtmlOutputFormatter extends OutputFormatter
             }
         }
 
-        return $out . '">'.$matches[2].'</span>';
+        return $out.'">'.$matches[2].'</span>';
     }
 }