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>
    <allredirects garcontinue="Columbia_Harbour_House" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1624" ns="0" title="Backlot Tour" />
      <page pageid="1966" ns="0" title="Be Our Guest" />
      <page pageid="1964" ns="0" title="Be Our Guest Restaurant" />
      <page pageid="1653" ns="0" title="Beauty and the Beast Live On Stage" />
      <page pageid="197" ns="0" title="Big Thunder Mountain Railroad" />
      <page pageid="2446" ns="0" title="Boulangerie Patisserie Les Halles" />
      <page pageid="2177" ns="0" title="Casey&#039;s Corner" />
      <page pageid="1844" ns="0" title="Casey Jr. Splash &#039;N&#039; Soak Station" />
      <page pageid="1905" ns="0" title="Cinderella&#039;s Royal Table" />
      <page pageid="2227" ns="0" title="Club Cool" />
    </pages>
  </query>
</api>