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>
    <allimages gaicontinue="Thesen-Papier_WS11_-_Autoindustrie,_Snell-Report.pdf" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1879" ns="6" title="Datei:Taeuschende Argumentationen Schema.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2016-07-30T14:40:48Z" user="Christoph" />
        </imageinfo>
      </page>
      <page pageid="1722" ns="6" title="Datei:Tage der Schlichtung.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2023-07-20T05:56:21Z" user="Christoph" />
        </imageinfo>
      </page>
      <page pageid="2009" ns="6" title="Datei:Talkessel mit K20.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2020-10-12T17:40:58Z" user="Christoph" />
        </imageinfo>
      </page>
      <page pageid="2010" ns="6" title="Datei:Talkessel mit S21 und Risiken.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2020-10-12T17:42:10Z" user="Christoph" />
        </imageinfo>
      </page>
    </pages>
  </query>
</api>