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>
    <pages>
      <page pageid="30" ns="0" title="Dynomotion Software Installation" />
      <page pageid="56" ns="0" title="How to install KMotion.exe and KMotion in Windows 10" />
      <page pageid="153" ns="0" title="Step/Dir Drives loose 2 Steps for each pair of Direction Reversals" />
    </pages>
  </query>
</api>