fixing comment for #239

underscore.js

@@ -66,7 +66,7 @@
   // --------------------
 
   // The cornerstone, an `each` implementation, aka `forEach`.
-  // Handles objects implementing `forEach`, arrays, and raw objects.
+  // Handles objects with the built-in `forEach`, arrays, and raw objects.
   // Delegates to **ECMAScript 5**'s native `forEach` if available.
   var each = _.each = _.forEach = function(obj, iterator, context) {
     if (obj == null) return;