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="20100313012234" timestamp="2010-03-13T01:22:34Z" ns="0" title="ISBoxer 35" />
        <page value="20100605175107" timestamp="2010-06-05T17:51:07Z" ns="0" title="ISBoxer 36" />
        <page value="20110209195425" timestamp="2011-02-09T19:54:25Z" ns="0" title="Export to Inner Space" />
        <page value="20110209195908" timestamp="2011-02-09T19:59:08Z" ns="0" title="Window Swapping" />
        <page value="20110210205756" timestamp="2011-02-10T20:57:56Z" ns="0" title="Inner Space" />
        <page value="20110212032153" timestamp="2011-02-12T03:21:53Z" ns="0" title="Slot" />
        <page value="20110216034351" timestamp="2011-02-16T03:43:51Z" ns="0" title="Keystroke Action" />
        <page value="20110223170055" timestamp="2011-02-23T17:00:55Z" ns="0" title="Console" />
        <page value="20110227001833" timestamp="2011-02-27T00:18:33Z" ns="0" title="Window State Action" />
        <page value="20110227154205" timestamp="2011-02-27T15:42:05Z" ns="0" title="ISBoxer 38" />
      </results>
    </querypage>
  </query>
</api>