You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <random>
      <page id="3643" ns="0" title="Possible Causes Of Corns On Feet The Actual You May Do About Them" />
      <page id="2888" ns="0" title="Cavus Foot Surgery Pre And Post" />
    </random>
  </query>
</api>