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="Cedeus_IDE" />
  </query-continue>
  <query>
    <pages>
      <page pageid="93" ns="0" title="Backup of geonode" />
      <page pageid="126" ns="0" title="Blackboard" />
      <page pageid="128" ns="0" title="CEDEUS CSW" />
      <page pageid="99" ns="0" title="CEDEUS Server Setup" />
      <page pageid="92" ns="0" title="CEDEUS ShortTime ToDo List" />
      <page pageid="88" ns="0" title="Cedeus Base Data" />
      <page pageid="101" ns="0" title="Cedeus Convenios" />
      <page pageid="115" ns="0" title="Cedeus DB backups" />
      <page pageid="90" ns="0" title="Cedeus Evaluacion de GeoNode" />
      <page pageid="84" ns="0" title="Cedeus Hardware" />
    </pages>
  </query>
</api>