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="149509" ns="0" title="How to Get a Girl to Have Sex With You6561618" />
      <page id="118441" ns="0" title="On-line Poker Games755956" />
    </random>
  </query>
</api>