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>
    <allredirects garcontinue="Bernard-Haquet_G50|9744" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2837" ns="0" title="Fête du Tournesol (Ben)" />
      <page pageid="3110" ns="0" title="Piscine de Huy" />
      <page pageid="5014" ns="0" title="Bassin de natation" />
      <page pageid="7939" ns="0" title="Le Ban d&#039;Ouffet" />
      <page pageid="8072" ns="0" title="Ouffet, Basse Voye" />
      <page pageid="11654" ns="0" title="Basasable 43" />
      <page pageid="12011" ns="0" title="Baye-Smets T257" />
      <page pageid="12613" ns="0" title="Bastin-Deblire NC" />
      <page pageid="12622" ns="0" title="Bacasable 49" />
      <page pageid="12649" ns="0" title="Bacasable 41 Tigepirette" />
    </pages>
  </query>
</api>