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="Comprendre_les_discussions_techniques|1037" />
  </query-continue>
  <query>
    <pages>
      <page pageid="937" ns="0" title="Opers" />
      <page pageid="939" ns="0" title="Enregistrer un pseudo" />
      <page pageid="940" ns="0" title="Enregistrer un salon" />
      <page pageid="1037" ns="0" title="Questions fréquemment posées" />
      <page pageid="1042" ns="14" title="Catégorie:Informations officieuses" />
      <page pageid="1062" ns="0" title="Accueil" />
      <page pageid="1972" ns="0" title="Doppleganger" />
      <page pageid="1982" ns="0" title="Mettre un bot sur un salon" />
      <page pageid="2112" ns="0" title="Memoserv" />
      <page pageid="2113" ns="0" title="Modes des salons" />
    </pages>
  </query>
</api>