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="Bagijnestraat|3338" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2337" ns="0" title="Ordonnantie op de Bier-kaye, wegens &#039;t vervoeren van de Bieren, Anno 1615 den 23 November" />
      <page pageid="2442" ns="0" title="Trompet" />
      <page pageid="3239" ns="0" title="Tussen Hel en Vagevuur" />
      <page pageid="3401" ns="0" title="Nieuwe Harkesteiger" />
      <page pageid="3521" ns="0" title="Noorder Havendijk" />
      <page pageid="4359" ns="0" title="Vos, Reijnier Jacobsz. - 25 april 1706" />
      <page pageid="4403" ns="0" title="Blankaart, Maria Jansdr. - 20 juli 1725" />
      <page pageid="4466" ns="0" title="Vos, Maria Jacobsdr. - 2 maart 1718" />
    </pages>
  </query>
</api>