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="2730" ns="0" title="Caledonia Monarch" />
      <page pageid="2825" ns="0" title="Chery Valley" />
      <page pageid="2840" ns="0" title="Chr. J. Kampman" />
      <page pageid="2900" ns="0" title="Clan Macwirter" />
      <page pageid="2957" ns="0" title="Councelor" />
      <page pageid="3133" ns="0" title="Elizabeth von Belgie" />
      <page pageid="3134" ns="0" title="Elisabeth von Belgie" />
      <page pageid="3144" ns="0" title="(MOWT)" />
    </pages>
  </query>
</api>