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>
    <allimages gaicontinue="CRAM_3.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="178" ns="6" title="File:CMake Installer 01.png" />
      <page pageid="179" ns="6" title="File:CMake Installer 02.png" />
      <page pageid="180" ns="6" title="File:CMake Installer 03.png" />
      <page pageid="181" ns="6" title="File:CMake Installer 04.png">
        <duplicatefiles>
          <df name="DSA_Installation_04.png" user="Dvernon" timestamp="2024-07-20T09:55:09Z" />
        </duplicatefiles>
      </page>
      <page pageid="182" ns="6" title="File:CMake Installer 05.png" />
      <page pageid="183" ns="6" title="File:CMake Installer 06.png" />
      <page pageid="184" ns="6" title="File:CMake Installer 07.png" />
      <page pageid="138" ns="6" title="File:CRAM 0.jpg" />
      <page pageid="139" ns="6" title="File:CRAM 1.jpg" />
      <page pageid="140" ns="6" title="File:CRAM 2.jpg" />
    </pages>
  </query>
</api>