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>
    <allfileusages gafcontinue="Bvine.gif|18162" />
  </query-continue>
  <query>
    <pages>
      <page pageid="17452" ns="0" title="Bible Authority...Can It Be Proven?" />
      <page pageid="17625" ns="0" title="Britain in Flames" />
      <page pageid="18141" ns="0" title="Worldliness." />
      <page pageid="18148" ns="0" title="How to Cope with Nightmares" />
      <page pageid="18157" ns="0" title="If You Don’t Have Alters" />
      <page pageid="18159" ns="0" title="Understanding Alters" />
      <page pageid="18160" ns="0" title="The Amazing Healing Power of Dealing with Alters" />
      <page pageid="18161" ns="0" title="Discerning Between Demons &amp; Multiple Personalities" />
      <page pageid="27328" ns="0" title="The EU’s Reluctant Player" />
    </pages>
  </query>
</api>