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="Energieerhaltungssatz" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bedingung" missing="" />
      <page ns="0" title="Beschleunigte Bewegung" missing="" />
      <page ns="0" title="Distributivgesetz" missing="" />
      <page ns="0" title="Ebenen im Raum" missing="" />
      <page ns="0" title="Einheitsvektor" missing="" />
      <page ns="0" title="Elektrische Spannung" missing="" />
      <page pageid="40" ns="0" title="Beschleunigte Bewegung (qualitativ)" />
      <page pageid="51" ns="0" title="Elastischer Stoß" />
      <page pageid="30" ns="0" title="Elektrische Ladung" />
      <page pageid="32" ns="0" title="Elektrischer Strom" />
    </pages>
  </query>
</api>