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 alcontinue="Bases_de_données_coopératives_:_structurer_ses_contenus_pour_les_présenter_et_diffuser_plus_facilement|31477" />
  </query-continue>
  <query>
    <alllinks>
      <l fromid="1590" ns="0" title="BIACS - Biennale d’Art contemporain de Séville" />
      <l fromid="1530" ns="0" title="BIJ de Brest" />
      <l fromid="1545" ns="0" title="BIJ de Brest" />
      <l fromid="22311" ns="0" title="Barcamp du forum" />
      <l fromid="26801" ns="0" title="Barcamp du forum" />
      <l fromid="26809" ns="0" title="Barcamp du forum" />
      <l fromid="1976" ns="0" title="Bas-Rhin" />
      <l fromid="22311" ns="0" title="Base de données coopératives" />
      <l fromid="26801" ns="0" title="Base de données coopératives" />
      <l fromid="26812" ns="0" title="Base de données coopératives" />
    </alllinks>
  </query>
</api>