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="DR_CARLS_2007.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3602" ns="6" title="File:2012-camplayout.png" />
      <page pageid="3619" ns="6" title="File:2014 tent layout.png" />
      <page pageid="1538" ns="6" title="File:Art car sketch.jpg" />
      <page pageid="3515" ns="6" title="File:Bm button.jpg" />
      <page pageid="3609" ns="6" title="File:Brc sun wind map.jpg" />
      <page pageid="3618" ns="6" title="File:Button template.pdf" />
      <page pageid="3461" ns="6" title="File:Carl-approved.png" />
      <page pageid="3519" ns="6" title="File:Circle-of-tiles.png" />
      <page pageid="3625" ns="6" title="File:Coozie tiles logo.png" />
      <page pageid="3585" ns="6" title="File:DIA DE LOS CARLOS.jpg" />
    </pages>
  </query>
</api>