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="Convention_for_the_Suppression_of_Unlawful_Acts_against_the_Safety_of_Civil_Aviation" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Berlin Hackathon 2012" missing="" />
      <page ns="0" title="Bureau International des Expositions" missing="" />
      <page ns="0" title="Collaboration" missing="" />
      <page ns="0" title="Commonwealth of Independent States" missing="" />
      <page pageid="4945" ns="0" title="Badamsha" />
      <page pageid="4947" ns="0" title="Baturasay" />
      <page pageid="4954" ns="0" title="Berchogur" />
      <page pageid="4956" ns="0" title="Bestamak" />
      <page pageid="7667" ns="0" title="Cape Town Treaty" />
      <page pageid="5541" ns="0" title="Central Asian Union" />
    </pages>
  </query>
</api>