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="20131226033343" timestamp="2013-12-26T03:33:43Z" ns="0" title="OriginalMainPage" />
        <page value="20131226201230" timestamp="2013-12-26T20:12:30Z" ns="0" title="Template File" />
        <page value="20131226201839" timestamp="2013-12-26T20:18:39Z" ns="0" title="Formula File" />
        <page value="20131228002249" timestamp="2013-12-28T00:22:49Z" ns="0" title="Configuration File" />
        <page value="20131228013702" timestamp="2013-12-28T01:37:02Z" ns="0" title="Personality" />
        <page value="20131228013756" timestamp="2013-12-28T01:37:56Z" ns="0" title="Context" />
        <page value="20131228023501" timestamp="2013-12-28T02:35:01Z" ns="0" title="Atomic adapter" />
        <page value="20131228030808" timestamp="2013-12-28T03:08:08Z" ns="0" title="Debug Monitor" />
        <page value="20131228033516" timestamp="2013-12-28T03:35:16Z" ns="0" title="Exporter" />
        <page value="20131228041428" timestamp="2013-12-28T04:14:28Z" ns="0" title="Granule Ordering" />
      </results>
    </querypage>
  </query>
</api>