fixing css comment

assets/css/font-awesome.css

@@ -120,7 +120,7 @@ li[class^="icon-"].icon-large:before, li[class*=" icon-"].icon-large:before {
 .icon-play-circle:before        { content: "\f01d"; }
 .icon-repeat:before             { content: "\f01e"; }
 
-// \f020 is not a valid unicode character. all shifted one down
+/* \f020 is not a valid unicode character. all shifted one down */
 .icon-refresh:before            { content: "\f021"; }
 .icon-list-alt:before           { content: "\f022"; }
 .icon-lock:before               { content: "\f023"; }

assets/less/font-awesome.less

@@ -144,7 +144,7 @@ li[class*=" icon-"] {
 .icon-play-circle:before        { content: "\f01d"; }
 .icon-repeat:before             { content: "\f01e"; }
 
-// \f020 is not a valid unicode character. all shifted one down
+/* \f020 is not a valid unicode character. all shifted one down */
 .icon-refresh:before            { content: "\f021"; }
 .icon-list-alt:before           { content: "\f022"; }
 .icon-lock:before               { content: "\f023"; }