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="Baal_Cadar|5555" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1454" ns="0" title="Sumpflager" />
      <page pageid="2329" ns="0" title="Baal Cadar" />
      <page pageid="3130" ns="0" title="Bewohner des Sumpflagers" />
      <page pageid="3948" ns="0" title="Die Kreise der Magie/Dialoge" />
      <page pageid="6243" ns="10" title="Vorlage:Dokumentation" />
      <page pageid="10947" ns="0" title="Cor Kalom/Dialoge" />
      <page pageid="13165" ns="0" title="Gothic Trivia" />
      <page pageid="14436" ns="0" title="Erzbarone/Dialoge" />
      <page pageid="16799" ns="0" title="Novizen des Schläfers/Dialoge" />
      <page pageid="17210" ns="0" title="Aufnahme Sumpflager (Tagebucheintrag)" />
    </pages>
  </query>
</api>