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" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1982" ns="0" title="Calculate Column Aggregate" />
      <page pageid="1405" ns="0" title="Category" />
      <page pageid="3523" ns="0" title="Communitcation between the AS400, CloudFaxGateway and the TF400Gateway" />
      <page pageid="3518" ns="0" title="Configuring the http server for https using the keytool" />
      <page pageid="1485" ns="0" title="Database Resource" />
      <page pageid="1981" ns="0" title="Data Table" />
      <page pageid="1455" ns="0" title="Decision Point Nodes" />
      <page pageid="2938" ns="0" title="Deprecated Tasks" />
      <page pageid="3003" ns="0" title="Document Locator" />
      <page pageid="1979" ns="0" title="Drop Column Node" />
    </pages>
  </query>
</api>