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="Herms1.JPG|2992" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1411" ns="0" title="Kegging" />
      <page pageid="1464" ns="0" title="Mash Tun" />
      <page pageid="1479" ns="0" title="Cooling" />
      <page pageid="1484" ns="0" title="Bottling" />
      <page pageid="1498" ns="0" title="Counter Pressure Filler" />
      <page pageid="1501" ns="0" title="Bottle Capper" />
      <page pageid="2978" ns="0" title="Grain Mill" />
      <page pageid="2983" ns="0" title="Home Brewer&#039;s Recipe Database" />
      <page pageid="2990" ns="2" title="User:Brundage" />
    </pages>
  </query>
</api>