fix matching on titleize

Author: jonschlinkert

lib/string.js

@@ -595,8 +595,8 @@ helpers.startsWith = function(prefix, str, options) {
 
 helpers.titleize = function(str) {
   if (!util.isString(str)) return '';
-  var title = str.replace(/[ \-_]+/g, ' ');
-  var words = title.match(/\w+/g);
+  var title = str.replace(/[- _]+/g, ' ');
+  var words = title.split(' ');
   var len = words.length;
   var res = [];
   var i = 0;