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>
    <querypage name="Ancientpages">
      <results>
        <page value="20140217201833" timestamp="2014-02-17T20:18:33Z" ns="0" title="The Five" />
        <page value="20140217202033" timestamp="2014-02-17T20:20:33Z" ns="0" title="Sword of Nalin" />
        <page value="20140217202246" timestamp="2014-02-17T20:22:46Z" ns="0" title="Main Page" />
        <page value="20140217202434" timestamp="2014-02-17T20:24:34Z" ns="0" title="Cigars and Legs" />
        <page value="20140217202534" timestamp="2014-02-17T20:25:34Z" ns="0" title="Ron Cavanaugh" />
        <page value="20140217203224" timestamp="2014-02-17T20:32:24Z" ns="0" title="The Boots Are Red" />
      </results>
    </querypage>
  </query>
</api>