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="Pages_Personnelles" />
  </query-continue>
  <query>
    <pages>
      <page pageid="309" ns="0" title="Cercles de conflexion" />
      <page pageid="361" ns="0" title="Cercles de réflexion" />
      <page pageid="12" ns="0" title="Contributions et Débats" />
      <page pageid="8" ns="0" title="Cyber Mer" />
      <page pageid="305" ns="0" title="Interventions du BSI@en65.fr" />
      <page pageid="28" ns="0" title="Liste de diffusion groupée" />
      <page pageid="23" ns="0" title="Liste de diffusion interne" />
      <page pageid="34" ns="0" title="Mode d&#039;emploi / FAQ" />
      <page pageid="39" ns="0" title="Musée" />
      <page pageid="149" ns="0" title="Nétiquette" />
    </pages>
  </query>
</api>