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>
    <revisions rvcontinue="3840" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="Hekksy" timestamp="2020-08-15T23:20:52Z" comment="Introduce Odalauncher to the main page for support" />
          <rev user="Hekksy" timestamp="2019-07-24T19:15:20Z" comment="" />
          <rev user="HeX9109" timestamp="2019-01-05T05:01:34Z" comment="removing irc from the front page and replacing it with discord" />
          <rev user="HeX9109" timestamp="2018-10-13T20:00:38Z" comment="" />
          <rev user="Manc" timestamp="2017-02-23T23:58:11Z" comment="" />
        </revisions>
      </page>
    </pages>
  </query>
</api>