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="20100818200937" timestamp="2010-08-18T20:09:37Z" ns="0" title="Java" />
        <page value="20100818204124" timestamp="2010-08-18T20:41:24Z" ns="0" title="쌍춘년" />
        <page value="20100818204438" timestamp="2010-08-18T20:44:38Z" ns="0" title="황금돼지해" />
        <page value="20100818205735" timestamp="2010-08-18T20:57:35Z" ns="0" title="Paul Ewald" />
        <page value="20100819125503" timestamp="2010-08-19T12:55:03Z" ns="0" title="Plague time" />
        <page value="20100820202612" timestamp="2010-08-20T20:26:12Z" ns="0" title="Mechanize (Python)" />
        <page value="20100820203703" timestamp="2010-08-20T20:37:03Z" ns="0" title="Twill (Python)" />
        <page value="20100821234904" timestamp="2010-08-21T23:49:04Z" ns="0" title="Walrus" />
        <page value="20100821235243" timestamp="2010-08-21T23:52:43Z" ns="0" title="Ubigraph" />
        <page value="20100822000727" timestamp="2010-08-22T00:07:27Z" ns="0" title="Pajek" />
      </results>
    </querypage>
  </query>
</api>