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="1258" ns="0" title="MAI2 PUMP PICTOR 3D" />
      <page id="731" ns="0" title="Makita 9404 Belt Sander" />
    </random>
  </query>
</api>