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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20090430180657" timestamp="2009-04-30T18:06:57Z" ns="0" title="Danfoss" />
        <page value="20090430231711" timestamp="2009-04-30T23:17:11Z" ns="0" title="Stage avril 2009" />
        <page value="20090517213635" timestamp="2009-05-17T21:36:35Z" ns="0" title="Station de récupération" />
        <page value="20090524121304" timestamp="2009-05-24T12:13:04Z" ns="0" title="Soudage" />
        <page value="20090609053511" timestamp="2009-06-09T05:35:11Z" ns="0" title="Panne frigorifique" />
        <page value="20090609174701" timestamp="2009-06-09T17:47:01Z" ns="0" title="Diagramme" />
        <page value="20090609175225" timestamp="2009-06-09T17:52:25Z" ns="0" title="Mise en service" />
        <page value="20090618212155" timestamp="2009-06-18T21:21:55Z" ns="0" title="Balance" />
        <page value="20090622165319" timestamp="2009-06-22T16:53:19Z" ns="0" title="ISO 3511-X" />
        <page value="20090622183349" timestamp="2009-06-22T18:33:49Z" ns="0" title="Appareil" />
      </results>
    </querypage>
  </query>
</api>