Fix slow regexp in removeCapturingGroups

Author: nightwing

lib/ace/tokenizer.js

@@ -176,7 +176,7 @@ var Tokenizer = function(rules) {
 
     this.removeCapturingGroups = function(src) {
         var r = src.replace(
-            /\[(?:\\.|[^\]])*?\]|\\.|\(\?[:=!]|(\()/g,
+            /\\.|\[(?:\\.|[^\\\]])*|\(\?[:=!]|(\()/g,
             function(x, y) {return y ? "(?:" : x;}
         );
         return r;