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>
    <allfileusages gafcontinue="FernbedienungsCodes.txt|50" />
  </query-continue>
  <query>
    <pages>
      <page pageid="17" ns="0" title="KY-005 Infrarot Transmitter Modul" />
      <page pageid="56" ns="0" title="KY-024 Linear magnetic Hall Sensor" />
      <page pageid="58" ns="0" title="KY-025 Reed Modul" />
      <page pageid="60" ns="0" title="KY-026 Flamen-Sensor Modul" />
      <page pageid="65" ns="0" title="KY-028 Temperatur Sensor Modul (Thermistor)" />
      <page pageid="81" ns="0" title="KY-036 Metall-Touchsensor Modul" />
      <page pageid="83" ns="0" title="KY-037 Mikrofon Sensor Modul - hohe Empfindlichkeit" />
      <page pageid="85" ns="0" title="KY-038 Mikrofon Sound Sensor Modul" />
      <page pageid="87" ns="0" title="KY-039 Herzschlag Sensor Modul" />
      <page pageid="298" ns="0" title="LK-PIR" />
    </pages>
  </query>
</api>