You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <expandtemplates xml:space="preserve">Testing this out!

&lt;pre&gt; pre tag works &lt;/pre&gt;
ff7700

==Using files from Wikimedia Commons Test==

[[File:Human-gnome-netstatus-75-100.svg]]

==Using pictures from flickr==

&lt;code&gt;&lt;nowiki&gt;&lt;flickr&gt;4225817710&lt;/flickr&gt;&lt;/nowiki&gt; produces...&lt;/code&gt;
&lt;flickr&gt;4225817710&lt;/flickr&gt;

One last test!</expandtemplates>
</api>