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="Commandes_les_plus_utiles" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Boost" missing="" />
      <page ns="0" title="Cavités résonnantes" missing="" />
      <page ns="0" title="Chicotte (lmgrd)" missing="" />
      <page pageid="1842" ns="0" title="BB" />
      <page pageid="1749" ns="0" title="Bourse ou contrat?" />
      <page pageid="1729" ns="0" title="Bourses CRSNG" />
      <page pageid="1299" ns="0" title="CVS" />
      <page pageid="1799" ns="0" title="Chercheur invité" />
      <page pageid="1882" ns="0" title="Circuit imprimé" />
      <page pageid="1303" ns="0" title="Combinaison GEL-GIF" />
    </pages>
  </query>
</api>