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="Débitmètre:_vérification_et_réparation|893" />
  </query-continue>
  <query>
    <pages>
      <page pageid="967" missing="" />
      <page pageid="62" ns="6" title="Fichier:T4-icon2.jpg" />
      <page pageid="968" ns="0" title="Chauffage stationnaire à air Eberspacher D3LC : Installation " />
      <page pageid="1011" ns="0" title="Dehler" />
      <page pageid="1198" ns="0" title="California T4" />
      <page pageid="1418" ns="0" title="Regulation chauffage" />
      <page pageid="1533" ns="12" title="Aide:Contribuer au wiki" />
      <page pageid="1806" ns="0" title="Clé" />
      <page pageid="3249" ns="0" title="Clignotants, question de ralais" />
      <page pageid="4094" ns="0" title="Pompe direction assistée vidange" />
    </pages>
  </query>
</api>