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="Chicken_scissors" />
  </query-continue>
  <query>
    <pages>
      <page pageid="516" ns="0" title="BW Crites" />
      <page pageid="190" ns="0" title="Bartel Water Bugs" />
      <page pageid="171" ns="0" title="Blood is Red" />
      <page pageid="157" ns="0" title="Bloodcast Season 1" />
      <page pageid="563" ns="0" title="Bonehead" />
      <page pageid="566" ns="0" title="Bones are White" />
      <page pageid="241" ns="0" title="Brocka the Razor-Barbed" />
      <page pageid="66" ns="0" title="Bryan Clauser" />
      <page pageid="239" ns="0" title="Buddha City Station" />
      <page pageid="1810" ns="0" title="Chaiyal North" />
    </pages>
  </query>
</api>