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="Disco_de_Newton._N15|105" />
  </query-continue>
  <query>
    <pages>
      <page pageid="34" ns="12" title="Help:Patrolled edits/es" />
      <page pageid="171" ns="2" title="User:Oscarmontesinos" />
      <page pageid="255" ns="0" title="Isaac Newton. N15" />
      <page pageid="941" ns="0" title="Madrid" />
      <page pageid="1163" ns="0" title="Toma de la Bastilla" />
      <page pageid="1185" ns="0" title="Historia de Suecia" />
      <page pageid="1190" ns="0" title="Sufragistas relevantes" />
      <page pageid="1576" ns="0" title="Instrumental Médico" />
      <page pageid="1579" ns="0" title="Sufragio femenino en España" />
    </pages>
  </query>
</api>