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>
    <allpages apcontinue="Colt_CA0_Innenlicht" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="789" ns="0" title="Beleuchtete Nummernschilder" />
      <p pageid="859" ns="0" title="Colt C10" />
      <p pageid="860" ns="0" title="Colt C10 Modellausstattungen" />
      <p pageid="861" ns="0" title="Colt C50" />
      <p pageid="862" ns="0" title="Colt C50 Modellausstattungen" />
      <p pageid="863" ns="0" title="Colt C50 Motoren" />
      <p pageid="868" ns="0" title="Colt CA0" />
      <p pageid="879" ns="0" title="Colt CA0 Aufkleber" />
      <p pageid="878" ns="0" title="Colt CA0 Auspuffblende" />
      <p pageid="871" ns="0" title="Colt CA0 Hifi" />
    </allpages>
  </query>
</api>