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="Dynamic_Task_Calls|3545" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1404" ns="0" title="Categories" />
      <page pageid="1457" ns="0" title="Decision Node" />
      <page pageid="1486" ns="0" title="Database Connections" />
      <page pageid="2939" ns="0" title="Deprecated" />
      <page pageid="3445" ns="0" title="File Chooser" />
      <page pageid="3519" ns="0" title="Https" />
      <page pageid="3531" ns="0" title="CloudFaxGateway and TF400Gateway Communication" />
      <page pageid="3540" ns="0" title="Calculate Column Aggregatez" />
      <page pageid="3544" ns="0" title="Presence Data Table" />
      <page pageid="3564" ns="0" title="Drop Column" />
    </pages>
  </query>
</api>