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="Brzeziny|192" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Strona domowa" />
      <page pageid="19" ns="0" title="Michał Biernacki" />
      <page pageid="22" ns="0" title="Uzupełnienia 2" />
      <page pageid="85" ns="0" title="Geografia rodzinna" />
      <page pageid="89" ns="0" title="Tomaszów Mazowiecki" />
      <page pageid="101" ns="0" title="Łódź" />
      <page pageid="134" ns="0" title="Cv Michał Biernacki" />
      <page pageid="814" ns="0" title="Obywatele Jacynicze" />
    </pages>
  </query>
</api>