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>
    <allfileusages gafcontinue="Baies-Jumelles.jpg|14" />
  </query-continue>
  <query>
    <pages>
      <page pageid="22" ns="0" title="3) &quot;Au Fil de l&#039;Eau&quot;" />
      <page pageid="53" ns="0" title="Bagoran de Marale" />
      <page pageid="699" ns="14" title="Catégorie:Grand Nord" />
      <page pageid="837" ns="0" title="Écume 2" />
      <page pageid="1044" ns="0" title="23) &quot;Votre Éminence&quot;" />
      <page pageid="1307" ns="14" title="Catégorie:Cartes" />
      <page pageid="1709" ns="0" title="50) &quot;Fortune de Mer&quot;" />
      <page pageid="1710" ns="0" title="Baie des Guivres" />
      <page pageid="1773" ns="0" title="54) &quot;Parages&quot;" />
    </pages>
  </query>
</api>