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="Blerh.jpg|165" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4" ns="0" title="Svg test" />
      <page pageid="10" ns="0" title="Military Ranks Feudal Hierarchy" />
      <page pageid="98" ns="0" title="Template Example Neverwinter Armour" />
      <page pageid="101" ns="10" title="Template:Boe" />
      <page pageid="103" ns="10" title="Template:Bop" />
      <page pageid="165" ns="0" title="Game Design Ideas Geology Simulator Part 1" />
      <page pageid="481" ns="0" title="Hârn Kandáy Perishire Dureve Fanon" />
    </pages>
  </query>
</api>