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="BackTrack_Inlay_Back.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2302" ns="6" title="File:Baccarat Inlay.jpg" />
      <page pageid="2303" ns="6" title="File:Baccarat Manual01.jpg" />
      <page pageid="2304" ns="6" title="File:Baccarat Manual02.jpg" />
      <page pageid="2305" ns="6" title="File:Baccarat Screenshot01.png" />
      <page pageid="2306" ns="6" title="File:Baccarat Screenshot02.png" />
      <page pageid="2307" ns="6" title="File:Baccarat Screenshot03.png" />
      <page pageid="2308" ns="6" title="File:Baccarat Screenshot04.png" />
      <page pageid="2309" ns="6" title="File:Baccarat Screenshot05.png" />
      <page pageid="2310" ns="6" title="File:Baccarat Screenshot06.png" />
      <page pageid="2311" ns="6" title="File:Baccarat Tape.jpg" />
    </pages>
  </query>
</api>