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>
    <recentchanges rccontinue="20181005084753|7132" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="Manage Users" pageid="4174" revid="6657" old_revid="6655" rcid="7142" timestamp="2018-10-05T09:12:31Z" />
      <rc type="edit" ns="0" title="Presence User Management" pageid="2660" revid="6656" old_revid="5616" rcid="7141" timestamp="2018-10-05T09:12:14Z" />
      <rc type="edit" ns="0" title="Manage Users" pageid="4174" revid="6655" old_revid="6654" rcid="7140" timestamp="2018-10-05T09:10:38Z" />
      <rc type="edit" ns="0" title="Manage Users" pageid="4174" revid="6654" old_revid="6651" rcid="7139" timestamp="2018-10-05T09:09:04Z" />
      <rc type="edit" ns="0" title="Securing Categories" pageid="2942" revid="6653" old_revid="4063" rcid="7138" timestamp="2018-10-05T09:08:14Z" />
      <rc type="log" ns="6" title="File:Category access.png" pageid="3606" revid="0" old_revid="0" rcid="7137" timestamp="2018-10-05T09:07:59Z" />
      <rc type="edit" ns="0" title="Manage Users" pageid="4174" revid="6651" old_revid="6650" rcid="7136" timestamp="2018-10-05T09:05:36Z" />
      <rc type="new" ns="0" title="Manage Users" pageid="4174" revid="6650" old_revid="0" rcid="7135" timestamp="2018-10-05T08:55:07Z" />
      <rc type="log" ns="6" title="File:Screen Shot 2018-10-05 at 09.52.13.png" pageid="4173" revid="0" old_revid="0" rcid="7134" timestamp="2018-10-05T08:52:37Z" />
      <rc type="log" ns="6" title="File:Screen Shot 2018-10-05 at 09.48.45.png" pageid="4172" revid="0" old_revid="0" rcid="7133" timestamp="2018-10-05T08:51:37Z" />
    </recentchanges>
  </query>
</api>