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>
    <allredirects garcontinue="Reactions" />
  </query-continue>
  <query>
    <pages>
      <page pageid="114" ns="0" title="Battle" />
      <page pageid="1600" ns="0" title="Chevaliers and Shepherds" />
      <page pageid="94" ns="0" title="Combat System" />
      <page pageid="109" ns="0" title="Finishing Attacks" />
      <page pageid="1800" ns="0" title="HiME Sentai" />
      <page pageid="130" ns="0" title="Knockouts" />
      <page pageid="149" ns="0" title="Organization: Dark Fall" />
      <page pageid="408" ns="0" title="Organization: Ends of the World" />
      <page pageid="394" ns="0" title="Organization: The Magic Association" />
      <page pageid="407" ns="0" title="Organization: The Tuner Organization" />
    </pages>
  </query>
</api>