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="03_ak_contact_repost-rockingak2-2.gif" />
  </query-continue>
  <query>
    <pages>
      <page pageid="880" ns="6" title="File:0003 - Yoshi Touch &amp; Go (U).nds.sav" />
      <page pageid="3708" ns="6" title="File:01 ak2i bootloader wiki df icon.gif" />
      <page pageid="3369" ns="6" title="File:01 ak contact repost-dscon.jpg" />
      <page pageid="237" ns="6" title="File:0201-box.jpg" />
      <page pageid="235" ns="6" title="File:0201-raw-1.sav" />
      <page pageid="3709" ns="6" title="File:02 ak2i bootloader wiki ar icon.gif" />
      <page pageid="3370" ns="6" title="File:02 ak contact repost-ak and paper.jpg" />
      <page pageid="1172" ns="6" title="File:0367-box.jpg" />
      <page pageid="1173" ns="6" title="File:0367 - Metroid Prime Hunters.zip" />
      <page pageid="3710" ns="6" title="File:03 ak2i bootloader wiki ar icon.gif" />
    </pages>
  </query>
</api>