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="394" ns="0" title="Loi n° 83-634 du 13 juillet 1983/Article 17" />
      <page id="465" ns="0" title="JOAN - Q - 5 décembre 2006 - Service des boîtes postales aux particuliers" />
    </random>
  </query>
</api>