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|106" />
  </query-continue>
  <query>
    <pages>
      <page pageid="49" ns="0" title="P.100" />
      <page pageid="109" ns="0" title="Ki-61 Hien" />
      <page pageid="111" ns="0" title="J7W1 Shinden" />
      <page pageid="112" ns="0" title="J7W2 Shinden-Kai" />
      <page pageid="113" ns="0" title="Ki-32" />
      <page pageid="115" ns="0" title="Ki-98" />
      <page pageid="117" ns="0" title="Ki-48 Sokei" />
      <page pageid="124" ns="0" title="Ki-105 Otori" />
      <page pageid="1118" ns="0" title="Fairey Sowrdfish Mk.II" />
      <page pageid="2355" ns="0" title="Ko Gata" />
    </pages>
  </query>
</api>