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>
    <pageswithprop pwpcontinue="95" />
  </query-continue>
  <query>
    <pageswithprop>
      <page pageid="80" ns="0" title="Light Tanks" value="Light Tanks" />
      <page pageid="81" ns="0" title="Medium Tanks" value="Medium Tanks" />
      <page pageid="82" ns="0" title="Heavy Tanks" value="Heavy Tanks" />
      <page pageid="84" ns="0" title="Tank Destroyers" value="Tank Destroyers" />
      <page pageid="86" ns="10000" title="Tank:G06 PzII" value="Pz.Kpfw. II" />
      <page pageid="88" ns="10000" title="Tank:G102 Pz III" value="Pz.Kpfw. III Ausf. E" />
      <page pageid="89" ns="10000" title="Tank:G25 PzII Luchs" value="Pz.Kpfw. II Luchs" />
      <page pageid="91" ns="10000" title="Tank:G26 VK1602" value="VK 16.02 Leopard" />
      <page pageid="93" ns="0" title="Tanks of Germany" value="Germany" />
      <page pageid="94" ns="0" title="Tanks of USA" value="USA" />
    </pageswithprop>
  </query>
</api>