Correct preview and close #14

Author: l-lin

demo/partials/with_promise.html

@@ -9,4 +9,4 @@ <h3>With promise</h3>
 <p>
     See the API for the complete list of methods of the helper.
 </p>
-<iframe class="demo-preview" height="420px" src="http://embed.plnkr.co/gyAmixA0pTfNt9F1L2Px/preview"></iframe>
+<iframe class="demo-preview" height="420px" src="http://embed.plnkr.co/B9ltNzIRCwswgHqKD5Pp/preview"></iframe>