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="H2M_-_Imports" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="H2M - Edition d&#039;une fiche média" missing="" />
      <page ns="0" title="H2M - Generateur HTML" missing="" />
      <page ns="0" title="H2M - Gestion Emplacements" missing="" />
      <page ns="0" title="H2M - Gestion Prets" missing="" />
      <page ns="0" title="H2M - Gestion des médias/supports" missing="" />
      <page pageid="23" ns="0" title="CS : Java SE" />
      <page pageid="22" ns="0" title="CoursesM" />
      <page pageid="24" ns="0" title="Générateur de Numéros de licences" />
      <page pageid="8" ns="0" title="H2M - Création de fiche de média" />
      <page pageid="6" ns="0" title="H2M - Fichiers du logiciel" />
    </pages>
  </query>
</api>