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="Boomrang_feu|3221" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1189" ns="0" title="Bandeau noir" />
      <page pageid="2282" ns="0" title="BAS" />
      <page pageid="2377" ns="0" title="Bizi le clean rhôôô guili" />
      <page pageid="2673" ns="0" title="Bad Angels" />
      <page pageid="3021" ns="0" title="B.A.S." />
      <page pageid="3055" ns="0" title="B.A.S" />
      <page pageid="3169" ns="0" title="Bob le Goldorak" />
      <page pageid="3204" ns="0" title="Bankiz" />
      <page pageid="3222" ns="0" title="BC" />
      <page pageid="3294" ns="0" title="Bocaux" />
    </pages>
  </query>
</api>