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="Carita_Eklund" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Brita Pulliainen" missing="" />
      <page pageid="1495" ns="0" title="Baltian tie" />
      <page pageid="1543" ns="0" title="Biodiversity equals ethanol" />
      <page pageid="1994" ns="0" title="Blokus" />
      <page pageid="2489" ns="0" title="Boris Semenov" />
      <page pageid="1441" ns="0" title="Bridge" />
      <page pageid="1579" ns="0" title="Bridge-kurssi" />
      <page pageid="1558" ns="0" title="Bridge-sijoituksia" />
      <page pageid="1947" ns="0" title="CERN" />
      <page pageid="2247" ns="0" title="CH" />
    </pages>
  </query>
</api>