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 arcontinue="Belzane" />
  </query-continue>
  <query>
    <allredirects>
      <r ns="0" title="Baie de Kygaïa" />
      <r ns="0" title="Banque Centrale de Simland" />
      <r ns="0" title="Banque des Grandes Plaines" />
      <r ns="0" title="Banque simlandaise d&#039;investissement" />
      <r ns="0" title="Barack Obama Avenue" />
      <r ns="0" title="Barrio politico" />
      <r ns="0" title="Basse Génésie" />
      <r ns="0" title="Bassin Minier de Valik" />
      <r ns="0" title="Bassin de Simland" />
      <r ns="0" title="Beaumont-Pankow international" />
    </allredirects>
  </query>
</api>