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>
    <allpages>
      <p pageid="1066" ns="0" title="BVGcz Teplice" />
      <p pageid="766" ns="0" title="Bankomat ČSOB Bílina nádraží ČD" />
      <p pageid="767" ns="0" title="Bankomat ČSOB Duchcov Husova" />
      <p pageid="768" ns="0" title="Bankomat ČSOB Krupka Mariánské náměstí" />
      <p pageid="770" ns="0" title="Bankomat ČSOB Teplice Bohosudovská" />
      <p pageid="769" ns="0" title="Bankomat ČSOB Teplice Dubská" />
      <p pageid="772" ns="0" title="Bankomat ČSOB Teplice Krupská" />
      <p pageid="771" ns="0" title="Bankomat ČSOB Teplice Masarykova" />
      <p pageid="821" ns="0" title="Bankomat ČSOB Teplice Srbická" />
      <p pageid="262" ns="0" title="Bankomat České spořitelny Bílina Interspar" />
    </allpages>
  </query>
  <query-continue>
    <allpages apcontinue="Bankomat_České_spořitelny_Dubí_Ruská" />
  </query-continue>
</api>