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>
  <warnings>
    <main xml:space="preserve">Unrecognized parameter: '*'</main>
  </warnings>
  <query-continue>
    <revisions rvcontinue="2161" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="LordOfBikes" timestamp="2019-12-26T21:41:14Z" comment="fixed some links to old website and non https links, reported via GCI" />
          <rev user="Wolfgang Fahl" timestamp="2018-11-06T11:19:32Z" comment="" />
          <rev user="LordOfBikes" timestamp="2018-04-10T16:25:09Z" comment="added Link &#039;LibreCAD Manuals Summary&#039; in Usage section" />
          <rev user="Feragon" timestamp="2018-01-30T18:35:55Z" comment="" />
          <rev user="R. van Twisk" timestamp="2017-03-12T16:04:41Z" comment="" />
        </revisions>
      </page>
    </pages>
  </query>
</api>