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>
    <allimages gaicontinue="VPN_details.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="94" ns="6" title="File:The package window will open revealing the installer.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2015-02-15T20:38:31Z" user="Sunny.chen" />
        </imageinfo>
      </page>
      <page pageid="93" ns="6" title="File:Tunnelblick 3.5beta06 build 4211.dmg.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2015-02-13T23:34:49Z" user="Sunny.chen" />
        </imageinfo>
      </page>
      <page pageid="100" ns="6" title="File:Tunnelblick icon appear.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2015-02-15T21:23:26Z" user="Sunny.chen" />
        </imageinfo>
      </page>
      <page pageid="153" ns="6" title="File:Use-googlecom.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2015-08-31T16:50:14Z" user="Vuyisile" />
        </imageinfo>
      </page>
    </pages>
  </query>
</api>