Docs: changed expanded custom icon example from arrow-r to arrow-d inline with collapsible set (content-collapsible-options.html)

Author: agcolom

docs/content/content-collapsible-options.html

@@ -94,10 +94,10 @@ <h2>Collapsible content</h2>
 				<p class="default">default: "minus"</p>
 				<p>Sets the icon for the header of the collapsible container when in an expanded state. To set the value for all instances of this widget, bind this option to the <a href="../../api/globalconfig.html">mobileinit event</a>:</p>
 <pre><code>$( document ).bind( "mobileinit", function(){
-    <strong>$.mobile.collapsible.prototype.options.expandedIcon = "arrow-r";</strong>
+    <strong>$.mobile.collapsible.prototype.options.expandedIcon = "arrow-d";</strong>
 });
 </code></pre>
-				<p>This option is also exposed as a data attribute: <code>data-expanded-icon=&quot;arrow-r&quot;</code>.</p>
+				<p>This option is also exposed as a data attribute: <code>data-expanded-icon=&quot;arrow-d&quot;</code>.</p>
 			</dd>
 
 			<dt><code>heading</code> <em>string</em></dt>