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-continue>
    <alllinks galcontinue="Benvolio_Hawkwood|85" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="66" ns="0" title="Fading Suns" />
      <page pageid="67" ns="0" title="Fatewalker Mechanics" />
      <page pageid="68" ns="0" title="Character Concepts" />
      <page pageid="69" ns="0" title="Lifepath Character Generation" />
      <page pageid="70" ns="0" title="Character Advancement" />
      <page pageid="80" ns="0" title="Lifepaths" />
      <page pageid="84" ns="0" title="Lucius Cassius" />
    </pages>
  </query>
</api>