Docs, Examples: fixed old icon-* to fa-*

src/_includes/examples/rotated-flipped.html

@@ -27,7 +27,7 @@
 <i class="fa fa-shield fa-rotate-180"></i> fa-rotate-180<br>
 <i class="fa fa-shield fa-rotate-270"></i> fa-rotate-270<br>
 <i class="fa fa-shield fa-flip-horizontal"></i> fa-flip-horizontal<br>
-<i class="fa fa-shield fa-flip-vertical"></i> icon-flip-vertical
+<i class="fa fa-shield fa-flip-vertical"></i> fa-flip-vertical
 {% endhighlight %}
     </div>
   </div>