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="Outils_informatiques_pour_la_recherche|8" />
  </query-continue>
  <query>
    <pages>
      <page pageid="12" ns="0" title="ConseilsRecherche" />
      <page pageid="13" ns="0" title="Conseils pour mener votre recherche" />
      <page pageid="15" ns="0" title="TRB2011" />
      <page pageid="16" ns="0" title="Information TRB 2011" />
      <page pageid="27" ns="0" title="BoursesTransport" />
      <page pageid="103" ns="0" title="FeatureBasedTrackingImprovements" />
      <page pageid="105" ns="0" title="ModelisationCirculation" />
      <page pageid="111" ns="0" title="Groupe d&#039;échange sur la modélisation de la circulation" />
      <page pageid="115" ns="0" title="Outils informatiques pour la recherche" />
      <page pageid="145" ns="0" title="DataScienceResources" />
    </pages>
  </query>
</api>