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>
    <allpages>
      <p pageid="4" ns="0" title="Calendar" />
      <p pageid="10" ns="0" title="DMR Digital Radio Information" />
      <p pageid="9" ns="0" title="Dallas Hamvention Trip Information" />
      <p pageid="8" ns="0" title="Ham Radio Stuff" />
      <p pageid="1" ns="0" title="Main Page" />
      <p pageid="7" ns="0" title="Project Page" />
      <p pageid="3" ns="0" title="SPARC" />
      <p pageid="2" ns="0" title="SPARC-St. Paul United Methodist Church Amateur Radio Club" />
    </allpages>
  </query>
</api>