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="Christina_Gagnon" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Beatrice LaPlante" missing="" />
      <page ns="0" title="Ben Lee" missing="" />
      <page ns="0" title="Blanche Robinson" missing="" />
      <page ns="0" title="Catherine Gagnon" missing="" />
      <page ns="0" title="Charles Goupil" missing="" />
      <page pageid="92" ns="0" title="Barnabé Gagnon" />
      <page pageid="6" ns="0" title="Barnabé Gagnon (1547)" />
      <page pageid="86" ns="0" title="Blanche Alice Gagnon" />
      <page pageid="85" ns="0" title="Cecile Rosa Gagnon" />
      <page pageid="66" ns="0" title="Charles Gagnon (1839)" />
    </pages>
  </query>
</api>