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>
    <embeddedin eicontinue="10|Stub|110" />
  </query-continue>
  <query>
    <embeddedin>
      <ei pageid="36" ns="0" title="Template for a Page" />
      <ei pageid="40" ns="0" title="Places" />
      <ei pageid="41" ns="0" title="People in the Old Testament" />
      <ei pageid="85" ns="0" title="CMS for Churches" />
      <ei pageid="86" ns="0" title="Management Software for Churches" />
      <ei pageid="93" ns="0" title="Template for a Media Page" />
      <ei pageid="101" ns="0" title="Connie Scott" />
      <ei pageid="103" ns="0" title="Mitchell Family Books" />
      <ei pageid="107" ns="0" title="Canadian Church Press" />
      <ei pageid="108" ns="0" title="ChristianArtists.ca" />
    </embeddedin>
  </query>
</api>