typo

Author: lewisje

es6-shim.js

@@ -651,7 +651,7 @@
   var hasStringTrimBug = ws.trim() || '\u0085\u002B'.trim().length !== 2;
   if (hasStringTrimBug) {
     delete String.prototype.trim;
-    var wsRegexpChars = '[' + ws + '][' + ws + ']*';
+    var wsRegexChars = '[' + ws + '][' + ws + ']*';
     var trimBeginRegexp = new RegExp('^' + wsRegexChars);
     var trimEndRegexp = new RegExp(wsRegexChars + '$');
     defineProperties(String.prototype, {