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="Breaking_Chain" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Breakaway 2010" missing="" />
      <page pageid="620" ns="0" title="Bailey Bercik" />
      <page pageid="1193" ns="0" title="Bang Pham" />
      <page pageid="760" ns="0" title="Beatrice Herchek" />
      <page pageid="1247" ns="0" title="Bethany Sumner" />
      <page pageid="673" ns="0" title="Bill (Seungmin) Kim" />
      <page pageid="1213" ns="0" title="Bill Ao" />
      <page pageid="391" ns="0" title="Brad McKellar" />
      <page pageid="140" ns="0" title="Bradley McKellar" />
      <page pageid="88" ns="0" title="Brandon Adams" />
    </pages>
  </query>
</api>