Merge pull request php-debugbar#69 from barryvdh/patch-6

Fix open-btn css

Author: maximebf

src/DebugBar/Resources/debugbar.css

@@ -96,7 +96,7 @@ a.phpdebugbar-close-btn {
   height: 16px;
 }
 
-a.phpdebugbar-open-btn,{
+a.phpdebugbar-open-btn {
   background: url(icons.png) no-repeat -14px 8px;
   width: 16px;
   height: 16px;