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="2021-03-20T01:52:27Z|361" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="Short Notes on PSQL" rcid="371" pageid="48" revid="370" old_revid="367" timestamp="2021-09-17T10:50:05Z" />
      <rc type="edit" ns="0" title="Short Notes on Python" rcid="370" pageid="29" revid="369" old_revid="365" timestamp="2021-09-15T16:09:56Z" />
      <rc type="edit" ns="0" title="Main Page" rcid="369" pageid="1" revid="368" old_revid="366" timestamp="2021-07-09T15:34:24Z" />
      <rc type="edit" ns="0" title="Short Notes on PSQL" rcid="368" pageid="48" revid="367" old_revid="353" timestamp="2021-07-09T15:33:50Z" />
      <rc type="edit" ns="0" title="Main Page" rcid="367" pageid="1" revid="366" old_revid="362" timestamp="2021-05-17T15:15:03Z" />
      <rc type="edit" ns="0" title="Short Notes on Python" rcid="366" pageid="29" revid="365" old_revid="364" timestamp="2021-05-17T15:14:50Z" />
      <rc type="edit" ns="0" title="Short Notes on Python" rcid="365" pageid="29" revid="364" old_revid="356" timestamp="2021-05-17T15:14:18Z" />
      <rc type="edit" ns="0" title="Short Notes on MySQL" rcid="364" pageid="39" revid="363" old_revid="240" timestamp="2021-04-23T01:01:52Z" />
      <rc type="edit" ns="0" title="Main Page" rcid="363" pageid="1" revid="362" old_revid="358" timestamp="2021-04-23T00:49:51Z" />
      <rc type="edit" ns="0" title="Short Notes on git" rcid="362" pageid="43" revid="361" old_revid="360" timestamp="2021-03-20T01:58:46Z" />
    </recentchanges>
  </query>
</api>