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="EDGE-experience.png|500" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Capitalist Mentality" />
      <page pageid="76" ns="0" title="Gift Circle" />
      <page pageid="77" ns="0" title="Barn raising" />
      <page pageid="83" ns="0" title="Demonetization" />
      <page pageid="87" ns="0" title="Bailouts" />
      <page pageid="99" ns="0" title="Centralized Money" />
      <page pageid="162" ns="0" title="Free Hospitality" />
      <page pageid="274" ns="4" title="GiftEconomy:How To Help" />
      <page pageid="277" ns="0" title="Give and Take" />
      <page pageid="359" ns="0" title="EDGE/Use Cases" />
    </pages>
  </query>
</api>