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="20150128075350" timestamp="2015-01-28T07:53:50Z" ns="0" title="Snippets (CSS)" />
        <page value="20150128080635" timestamp="2015-01-28T08:06:35Z" ns="0" title="Erster Buchstabe groß" />
        <page value="20150811070251" timestamp="2015-08-11T07:02:51Z" ns="0" title="URL query ändern" />
        <page value="20150811072317" timestamp="2015-08-11T07:23:17Z" ns="0" title="CSV Datei" />
        <page value="20150811072437" timestamp="2015-08-11T07:24:37Z" ns="0" title="Isotope Produktfelder" />
        <page value="20150811084919" timestamp="2015-08-11T08:49:19Z" ns="0" title="Responsive Step Progress" />
        <page value="20150811142128" timestamp="2015-08-11T14:21:28Z" ns="0" title="Contao Theme erstellen" />
        <page value="20160212134538" timestamp="2016-02-12T13:45:38Z" ns="0" title="Thumbnail-Grid" />
        <page value="20160212135204" timestamp="2016-02-12T13:52:04Z" ns="0" title="Gedenkportal Film" />
        <page value="20160212135311" timestamp="2016-02-12T13:53:11Z" ns="0" title="Vorsorge-Film" />
      </results>
    </querypage>
  </query>
</api>