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="Mitsubishi_A6M2_Zero" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1768" ns="0" title="Boulton Paul P.100" />
      <page pageid="1441" ns="0" title="Fairey Swordfish Mk.II" />
      <page pageid="1264" ns="0" title="Kawasaki Ki-32" />
      <page pageid="1268" ns="0" title="Kawasaki Ki-48 Sokei" />
      <page pageid="1260" ns="0" title="Kawasaki Ki-61 Hien" />
      <page pageid="2354" ns="0" title="Ko-Gata Sensha" />
      <page pageid="1275" ns="0" title="Kokusai Ki-105 Otori" />
      <page pageid="1262" ns="0" title="Kyushu J7W1 Shinden" />
      <page pageid="1263" ns="0" title="Kyushu J7W2 Shinden-Kai" />
      <page pageid="1266" ns="0" title="Mansyu Ki-98" />
    </pages>
  </query>
</api>