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>
    <allredirects garcontinue="Banküberfall_auf_die_Dresdner_Bank_in_Hamburg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="7565" ns="0" title="BDA-Gebäude" />
      <page pageid="654" ns="0" title="Baader-Befreiung" />
      <page pageid="2639" ns="0" title="Bahnhof Alexandra Palace" />
      <page pageid="3402" ns="0" title="Bahnhof Berlin-Lichtenberg" />
      <page pageid="3585" ns="0" title="Bahnhof Berlin Zoologischer Garten" />
      <page pageid="3790" ns="0" title="Bahnhof Friedrichstraße" />
      <page pageid="5590" ns="0" title="Baja-Studios" />
      <page pageid="6143" ns="0" title="Bally&#039;s Las Vegas" />
      <page pageid="4789" ns="0" title="Banküberfall auf die Creditanstalt Bankverein in Wien" />
      <page pageid="8671" ns="0" title="Banküberfall auf die Disconto Bank" />
    </pages>
  </query>
</api>