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="20181030113343|1928" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="Main Page" pageid="1" revid="1890" old_revid="1889" rcid="1938" timestamp="2018-11-27T09:52:16Z" />
      <rc type="edit" ns="0" title="Main Page" pageid="1" revid="1889" old_revid="1876" rcid="1937" timestamp="2018-11-12T02:18:18Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A001.png" pageid="651" revid="0" old_revid="0" rcid="1936" timestamp="2018-10-30T11:57:10Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A001.png" pageid="651" revid="0" old_revid="0" rcid="1935" timestamp="2018-10-30T11:56:00Z" />
      <rc type="edit" ns="0" title="Q-version:Hung Wen" pageid="285" revid="1886" old_revid="1205" rcid="1934" timestamp="2018-10-30T11:53:11Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A006.png" pageid="650" revid="0" old_revid="0" rcid="1933" timestamp="2018-10-30T11:41:18Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A005.png" pageid="649" revid="0" old_revid="0" rcid="1932" timestamp="2018-10-30T11:39:18Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A005.png" pageid="649" revid="0" old_revid="0" rcid="1931" timestamp="2018-10-30T11:37:57Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A004.png" pageid="648" revid="0" old_revid="0" rcid="1930" timestamp="2018-10-30T11:36:01Z" />
      <rc type="log" ns="6" title="File:鴻文 Hong-Wen こうぶん 홍문2018A004.png" pageid="648" revid="0" old_revid="0" rcid="1929" timestamp="2018-10-30T11:34:49Z" />
    </recentchanges>
  </query>
</api>