minor parser improvements

Author: jonschlinkert

lib/constants.js

@@ -89,7 +89,7 @@ module.exports = {
 
   // regular expressions
   REGEX_BACKSLASH: /\\(?![*+?^${}(|)[\]])/g,
-  REGEX_NON_SPECIAL_CHAR: /^[^@![\].,$*+?^{}()|\\/]+/,
+  REGEX_NON_SPECIAL_CHARS: /^[^@![\].,$*+?^{}()|\\/]+/,
   REGEX_SPECIAL_CHARS: /[-*+?.^${}(|)[\]]/,
   REGEX_SPECIAL_CHARS_BACKREF: /(\\?)((\W)(\3*))/g,
   REGEX_SPECIAL_CHARS_GLOBAL: /([-*+?.^${}(|)[\]])/g,