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>
    <alllinks galcontinue="Betty_Friedan|21062" />
  </query-continue>
  <query>
    <pages>
      <page pageid="498" ns="0" title="Ray Comfort" />
      <page pageid="497" ns="0" title="The Way of the Master" />
      <page pageid="389" ns="0" title="Let go, and let wiki" />
      <page pageid="438" ns="0" title="Fill in the blanks" />
      <page pageid="437" ns="0" title="Our Vision (wikified)" />
      <page pageid="21062" ns="0" title="American Humanist Association" />
      <page pageid="459" ns="1" title="Talk:Main Page" />
    </pages>
  </query>
</api>