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="Baillet-Harzimont_G95" />
  </query-continue>
  <query>
    <pages>
      <page pageid="6067" ns="0" title="BLETARD Céleste Joseph ... voir la suite" />
      <page pageid="6066" ns="0" title="BLÉTARD Léon Joseph Ghislain ... voir la suite" />
      <page pageid="212" ns="0" title="Bacasable1" />
      <page pageid="7846" ns="0" title="Bacasable2" />
      <page pageid="11629" ns="0" title="Bacasable 41" />
      <page pageid="12651" ns="0" title="Bacasable 49 commandes wikicode" />
      <page pageid="13046" ns="0" title="Badoux-Berleur NC276" />
      <page pageid="13051" ns="0" title="Badoux-Hazard NC441" />
      <page pageid="8821" ns="0" title="Badoux-Rainaud D2" />
      <page pageid="6182" ns="0" title="Badoux Jules Gilles ... en savoir plus" />
    </pages>
  </query>
</api>