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="BE-1:_2007_January_OldKiwi|5962" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3980" ns="0" title="MA 453 Spring 2009 Walther Week 1" />
      <page pageid="4952" ns="0" title="BE-1: Imaging Old Kiwi" />
      <page pageid="5671" ns="0" title="Problem set 10: These problems were all given by Dr. Davis on an exam Old Kiwi" />
      <page pageid="5962" ns="0" title="BE-1: Imaging OldKiwi" />
      <page pageid="6681" ns="0" title="Problem set 10: These problems were all given by Dr. Davis on an exam OldKiwi" />
      <page pageid="6938" ns="0" title="MA460 (Fall2009Walther)" />
    </pages>
  </query>
</api>