Escape a few more characters for in _.escapeRegExp for better narwhal/ringo/rhino support.

dist/lodash.underscore.js

@@ -49,7 +49,7 @@
    * See this [article on RegExp characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
-  var reRegExpChars =/[.*+?^${()|[\\]/g;
+  var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
 
   /** Used to match unescaped characters in compiled string literals */
   var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;
@@ -4432,7 +4432,7 @@
 
   /**
    * Escapes the RegExp special characters "\", "^", "$", ".", "|", "?", "*",
-   * "+", "(", ")", "[", and "{" in `string`.
+   * "+", "(", ")", "[", "]", "{" and "}" in `string`.
    *
    * @static
    * @memberOf _