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>
    <allimages gaicontinue="Pld._Utah_Default_Judgment.doc" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="6" title="File:800px-Map of USA with state names.svg.png" />
      <page pageid="136" ns="6" title="File:Affidavit for Collecting Personal Property in a Small Estate Proceeding.pdf" />
      <page pageid="126" ns="6" title="File:Bequest Language.pdf" />
      <page pageid="173" ns="6" title="File:Bill of Sale and Assignment and Assumption Agreement.doc" />
      <page pageid="174" ns="6" title="File:Ip confidentiality agt non-solicit.doc" />
      <page pageid="3" ns="6" title="File:Map of USA with state names (1).svg" />
      <page pageid="130" ns="6" title="File:Pld. Utah Affidavit Regarding Military Service.doc" />
      <page pageid="129" ns="6" title="File:Pld. Utah Affidavit in Support of Request for Entry of Default.doc" />
      <page pageid="131" ns="6" title="File:Pld. Utah Affidavit of Attorney&#039;s Fees.doc" />
      <page pageid="128" ns="6" title="File:Pld. Utah Default Certificate.doc" />
    </pages>
  </query>
</api>