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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20130217005357" timestamp="2013-02-17T00:53:57Z" ns="0" title="Tramitações, Tarefas e Atividades" />
        <page value="20130217173756" timestamp="2013-02-17T17:37:56Z" ns="0" title="Elaboração de documentos" />
        <page value="20130225191822" timestamp="2013-02-25T19:18:22Z" ns="0" title="Cadastro de processos" />
        <page value="20130321170616" timestamp="2013-03-21T17:06:16Z" ns="0" title="1 Reunião Preparatória (18/11/2013)" />
        <page value="20130321192726" timestamp="2013-03-21T19:27:26Z" ns="0" title="1ª Reunião Preparatória (18/11/2013)" />
        <page value="20130418140358" timestamp="2013-04-18T14:03:58Z" ns="0" title="1ª Reunião Formal (16/12/2013)" />
        <page value="20130425230205" timestamp="2013-04-25T23:02:05Z" ns="0" title="Ata da 1ª Reunião Formal (16/12/2013)" />
        <page value="20130524141512" timestamp="2013-05-24T14:15:12Z" ns="0" title="2ª Reunião Formal (22/01/2014)" />
        <page value="20130525184039" timestamp="2013-05-25T18:40:39Z" ns="0" title="Ata da 2ª Reunião Formal (22/01/2014)" />
        <page value="20130603140429" timestamp="2013-06-03T14:04:29Z" ns="0" title="Ata da 1ª Reunião Ordinária (16/12/2013)" />
      </results>
    </querypage>
  </query>
</api>