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>
    <alltransclusions gatcontinue="Box|74" />
  </query-continue>
  <query>
    <pages>
      <page pageid="6" ns="0" title="FV301" />
      <page pageid="54" ns="0" title="FCM F1" />
      <page pageid="61" ns="0" title="Bugatti 110P" />
      <page pageid="67" ns="0" title="Renault FT" />
      <page pageid="68" ns="0" title="Type 4 Chi-So" />
      <page pageid="69" ns="0" title="Isuzu Type 97" />
      <page pageid="70" ns="0" title="Nissan Type 180" />
      <page pageid="71" ns="0" title="Toyota Su-Ki" />
      <page pageid="72" ns="0" title="Isuzu Type 94" />
      <page pageid="73" ns="0" title="Type 1 Ho-Ha" />
    </pages>
  </query>
</api>