Fix issue with included images

input/includes/img.html

@@ -1,4 +1,4 @@
 <p><strong>{{include.caption | default: ""}}</strong></p>
 <img src="{{include.img}}" class="figure-img img-responsive img-rounded center-block" 
-  alt="{{include.caption}}" style="width:{{include.width}}">
+  alt="{{include.caption}}" style="width:{{include.width}}"/>
 <div style="clear:both;"></div>