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="Baillet-Harzimont_G95" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="BLETARD Céleste Joseph ... voir la suite" />
      <l ns="0" title="BLÉTARD Léon Joseph Ghislain ... voir la suite" />
      <l ns="0" title="Bacasable1" />
      <l ns="0" title="Bacasable2" />
      <l ns="0" title="Bacasable 41" />
      <l ns="0" title="Bacasable 49 commandes wikicode" />
      <l ns="0" title="Badoux-Berleur NC276" />
      <l ns="0" title="Badoux-Hazard NC441" />
      <l ns="0" title="Badoux-Rainaud D2" />
      <l ns="0" title="Badoux Jules Gilles ... en savoir plus" />
    </alllinks>
  </query>
</api>