Include test 4

_includes/infobox.html

 <div style="background-color: #1F8DD6; margin-top: 20px; margin-bottom: 20px; padding: 8px;">
-  <font color="white"><b>{{ include.content }}</b></font>
+  <font color="white"><b>{{ include.content | markdownify }}</b></font>
 </div>

guide-v1.md

@@ -5,7 +5,8 @@ weight: 1
 exclude_from_menu: true
 ---
 
-{% include infobox.html content="This guide is for ExoPlayer 1.x, which is now deprecated." %}
+{% include infobox.html content="This guide is for ExoPlayer 1.x, which is now deprecated.
+The latest developer guide can be found [here](guide.html)" %}
 
 <div id="table-of-contents">
 <div id="table-of-contents-header">Contents</div>