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="Barrio_S.E.C.O_(Daireaux)|258" />
  </query-continue>
  <query>
    <pages>
      <page pageid="48" ns="0" title="XXVII Festival de la Fortinera Deroense (2007)" />
      <page pageid="59" ns="0" title="XI Festival de la Fortinera Deroense (1991)" />
      <page pageid="74" ns="0" title="Primeros habitantes" />
      <page pageid="82" ns="0" title="Plaza San Martín" />
      <page pageid="95" ns="0" title="Banda Escuela de Música" />
      <page pageid="187" ns="0" title="Calle Carlos Pellegrini (Daireaux)" />
      <page pageid="193" ns="0" title="Calle Haydee Toranza (Daireaux)" />
      <page pageid="199" ns="0" title="1918" />
      <page pageid="200" ns="0" title="Agosto" />
    </pages>
  </query>
</api>