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="Borderpointmap.jpg|63" />
  </query-continue>
  <query>
    <pages>
      <page pageid="13" ns="0" title="Gazatteer" />
      <page pageid="61" ns="0" title="Locations" />
      <page pageid="67" ns="0" title="People of Borderpoint" />
      <page pageid="87" ns="0" title="Organizations" />
      <page pageid="136" ns="0" title="The Boar Hunt" />
      <page pageid="151" ns="0" title="Play by Post" />
      <page pageid="152" ns="0" title="Bastion Augusta Raphiel" />
      <page pageid="256" ns="0" title="The End of the Rainbow, part 2" />
      <page pageid="1313" ns="0" title="Firefly Characters" />
    </pages>
  </query>
</api>