lint: changed tick to exclamation mark

Author: mishanga

lib/csscomb.js

@@ -130,7 +130,7 @@ Comb.prototype = {
                 var changed = data !== processedData;
                 var lint = _this._lint;
 
-                var tick = (changed) ? (lint ? '\x1B[31m✓\x1B[39m' : '✓') : ' ';
+                var tick = changed ? (lint ? '!' : '✓') : ' ';
                 var message = _this._verbose ? console.log.bind(null, tick, path) : doNothing;
 
                 _this.processed++;