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="Cinderella&#039;s_Royal_Table|2487" />
  </query-continue>
  <query>
    <pages>
      <page pageid="198" ns="0" title="Thunder Mountain" />
      <page pageid="201" ns="0" title="Thunder Mountain Railroad" />
      <page pageid="205" ns="0" title="Big Thunder Mountain" />
      <page pageid="1655" ns="0" title="Beauty and the Beast Live on Stage" />
      <page pageid="1935" ns="0" title="Casey Jr. Splash &#039;n&#039; Soak Station" />
      <page pageid="1966" ns="0" title="Be Our Guest" />
      <page pageid="2445" ns="0" title="Boulangerie Patisserie" />
      <page pageid="2606" ns="0" title="Beast&#039;s Castle" />
      <page pageid="2775" ns="0" title="Studio Backlot" />
      <page pageid="2798" ns="0" title="Refreshment Corner" />
    </pages>
  </query>
</api>