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>
    <alllinks>
      <l ns="0" title="Barre d&#039;outils de page" />
      <l ns="0" title="Beginner&#039;s Guide to GitHub" />
      <l ns="0" title="Best Practices for Files on Roll20" />
      <l ns="0" title="Black Crusade" />
      <l ns="0" title="Brackets" />
      <l ns="0" title="Broadcasting From Google+ Hangouts On Air" />
      <l ns="0" title="Brouillard de guerre" />
      <l ns="0" title="Brouillard de guerrre" />
      <l ns="0" title="Building Character Sheets" />
      <l ns="0" title="Building Compendiums" />
    </alllinks>
  </query>
  <query-continue>
    <alllinks alcontinue="Burning_Wheel_Official_Sheet" />
  </query-continue>
</api>