Proper lists for example resources

examples_src/popup.html

@@ -7,7 +7,8 @@ docs: >
     Click on the map to get a popup.  The popup is composed of a few basic elements: a container, a close button, and a place for the content.  To anchor the popup to the map, an <code>ol.Overlay</code> is created with the popup container.  A listener is registered for the map's <code>click</code> event to display the popup, and another listener is set as the <code>click</code> handler for the close button to hide the popup.
   </p>
 tags: "overlay, popup, mapquest, openaerial"
-resources: popup.css
+resources:
+  - popup.css
 ---
 <div class="row-fluid">
   <div class="span12">