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>
    <allpages apcontinue="Dubbing_spoken_tutorial_using_Movie_Maker" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="172" ns="0" title="Campus Ambassador Programme" />
      <p pageid="19" ns="0" title="Community Feedback" />
      <p pageid="39" ns="0" title="Compatible File Formats" />
      <p pageid="273" ns="0" title="Computer-Literacy-Programme-for-schools-and-NGOs" />
      <p pageid="121" ns="0" title="Creation of Spoken Tutorial using Camstudio" />
      <p pageid="124" ns="0" title="Creation of spoken tutorial using recordMyDesktop" />
      <p pageid="102" ns="0" title="Creators Checklist" />
      <p pageid="114" ns="0" title="Dubbers Checklist" />
      <p pageid="37" ns="0" title="Dubbing Stages" />
      <p pageid="130" ns="0" title="Dubbing a spoken tutorial using Audacity and ffmpeg" />
    </allpages>
  </query>
</api>