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="Cad_contas_correntes_caixa|1767" />
  </query-continue>
  <query>
    <pages>
      <page pageid="158" ns="0" title="Cad veiculos" />
      <page pageid="252" ns="0" title="Cad contas correntes caixa" />
      <page pageid="430" ns="0" title="Dig de ctrc" />
      <page pageid="600" ns="0" title="Dig de act" />
      <page pageid="799" ns="0" title="Geracao de cobranca bancaria" />
      <page pageid="809" ns="0" title="Retorno de arquivos" />
      <page pageid="1315" ns="0" title="Faq do financeiro" />
      <page pageid="1487" ns="0" title="Balancete frota" />
      <page pageid="1631" ns="0" title="Controle cheque terceiro" />
    </pages>
  </query>
</api>