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="20160425231651" timestamp="2016-04-25T23:16:51Z" ns="0" title="Version Sommersemester 2014" />
        <page value="20160426154458" timestamp="2016-04-26T15:44:58Z" ns="0" title="Neue Seite" />
        <page value="20160524162613" timestamp="2016-05-24T16:26:13Z" ns="0" title="Milman Parry" />
        <page value="20170408155914" timestamp="2017-04-08T15:59:14Z" ns="0" title="Version Sommersemester 2015" />
        <page value="20170408160225" timestamp="2017-04-08T16:02:25Z" ns="0" title="Version Sommersemester 2016" />
        <page value="20170509150223" timestamp="2017-05-09T15:02:23Z" ns="0" title="Goody" />
        <page value="20170509170911" timestamp="2017-05-09T17:09:11Z" ns="0" title="(A)" />
        <page value="20170509183332" timestamp="2017-05-09T18:33:32Z" ns="0" title="„Gutenberg-Galaxis“" />
        <page value="20170516160158" timestamp="2017-05-16T16:01:58Z" ns="0" title="Harold A. Innis" />
        <page value="20170516160618" timestamp="2017-05-16T16:06:18Z" ns="0" title="McLuhan" />
      </results>
    </querypage>
  </query>
</api>