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>
    <alltransclusions gatcontinue="Categories_categories" />
  </query-continue>
  <query>
    <pages>
      <page ns="10" title="Modèle:Based on the" missing="" />
      <page ns="10" title="Modèle:Because of" missing="" />
      <page ns="10" title="Modèle:Because of the" missing="" />
      <page ns="10" title="Modèle:Because the" missing="" />
      <page ns="10" title="Modèle:Before you think on sending your goods or parcel or containers to any country in Europe, you must first decide on what logistics company you want to work with." missing="" />
      <page ns="10" title="Modèle:Believe that" missing="" />
      <page ns="10" title="Modèle:Bettors" missing="" />
      <page ns="10" title="Modèle:Can offer" missing="" />
      <page ns="10" title="Modèle:Can use" missing="" />
      <page ns="10" title="Modèle:Capability to" missing="" />
    </pages>
  </query>
</api>