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="DKW_505P_Hercules_P1.jpg|74" />
  </query-continue>
  <query>
    <pages>
      <page pageid="32" ns="0" title="Aprilia RS 50 Extrema" />
      <page pageid="60" ns="0" title="Beta RR 50 Enduro" />
      <page pageid="74" ns="0" title="Hercules P1" />
      <page pageid="272" ns="0" title="Zündapp CS 25" />
      <page pageid="367" ns="0" title="Fritz Hintermayr GmbH Nürnberg" />
      <page pageid="754" ns="0" title="Horex Rebell Sport 25" />
      <page pageid="964" ns="0" title="Ktm bora" />
      <page pageid="996" ns="0" title="Hercules Ultra 80 Chopper LC" />
      <page pageid="998" ns="0" title="Hercules Ultra 80 AC Chopper" />
      <page pageid="1146" ns="0" title="Rixe R 504" />
    </pages>
  </query>
</api>