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="Badia_Adell,_Joaquim|194" />
  </query-continue>
  <query>
    <pages>
      <page pageid="7" ns="0" title="Autors" />
      <page pageid="191" ns="0" title="Bandos de Castelló de la Plana, Els" />
      <page pageid="192" ns="0" title="Creu de Teulada, La" />
      <page pageid="193" ns="0" title="Diable en la presó, El" />
      <page pageid="264" ns="0" title="Barchino Pérez, Francesc" />
      <page pageid="1792" ns="0" title="Títols" />
      <page pageid="2976" ns="0" title="Llistat de caracters XML y HTML" />
      <page pageid="2979" ns="0" title="Prova" />
    </pages>
  </query>
</api>