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="Connectionip.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="62" ns="6" title="File:BusinessCard Filled 2014-05-05 1341.png" />
      <page pageid="63" ns="6" title="File:BusinessCard tile 2014-05-05 1258.png" />
      <page pageid="64" ns="6" title="File:ChangePassword 2014-05-05 1546.png" />
      <page pageid="65" ns="6" title="File:CompletedInstallation 2014-05-05 1031.png" />
      <page pageid="66" ns="6" title="File:Connecting states.png" />
      <page pageid="118" ns="6" title="File:ConnectionSettings-2014-05-05 1652.png" />
      <page pageid="67" ns="6" title="File:ConnectionSettings 2014-05-05 1359.png" />
      <page pageid="109" ns="6" title="File:ConnectionSettings TransparentIcon.png" />
      <page pageid="51" ns="6" title="File:Connectionincomingip.png" />
      <page pageid="52" ns="6" title="File:Connectionincomingpstn.png" />
    </pages>
  </query>
</api>