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="BTL-Chips" />
  </query-continue>
  <query>
    <pages>
      <page pageid="11378" ns="0" title="B.T.O." />
      <page pageid="46167" ns="0" title="B1 Live Newsfeed" />
      <page pageid="24635" ns="0" title="BAE Systems" />
      <page pageid="43649" ns="0" title="BARNABA$H" />
      <page pageid="30118" ns="0" title="BASF" />
      <page pageid="33996" ns="0" title="BAVARIA TRID" />
      <page pageid="30449" ns="0" title="BLOG - Leben als frisch erwachte (SWR)" />
      <page pageid="50733" ns="0" title="BMW 3XT" />
      <page pageid="28517" ns="0" title="BMW 550eco" />
      <page pageid="48019" ns="0" title="BOO Hung" />
    </pages>
  </query>
</api>