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>
    <allfileusages gafcontinue="BrokenRobot.png|11" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Peachtree Ridge High School" />
      <page pageid="88" ns="0" title="Brandon Adams" />
      <page pageid="139" ns="0" title="Brittany Davis" />
      <page pageid="140" ns="0" title="Bradley McKellar" />
      <page pageid="460" ns="0" title="Britney Mason" />
      <page pageid="620" ns="0" title="Bailey Bercik" />
      <page pageid="760" ns="0" title="Beatrice Herchek" />
      <page pageid="761" ns="0" title="Brittney Hagenbarth" />
      <page pageid="1021" ns="0" title="2010 Breakaway" />
      <page pageid="1193" ns="0" title="Bang Pham" />
    </pages>
  </query>
</api>