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="TG-logo-M-color-on-transparent.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="11177" ns="6" title="File:TAB PR.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2016-03-24T23:29:41Z" user="Maintenance script" anon="" />
        </imageinfo>
      </page>
      <page pageid="7750" ns="6" title="File:TAB PRL.png" imagerepository="local">
        <imageinfo>
          <ii timestamp="2016-03-24T23:28:04Z" user="Maintenance script" anon="" />
        </imageinfo>
      </page>
      <page pageid="9464" ns="6" title="File:TAdempiereConnection basic setting.jpg" imagerepository="local">
        <imageinfo>
          <ii timestamp="2016-03-24T23:28:42Z" user="Maintenance script" anon="" />
        </imageinfo>
      </page>
      <page pageid="11178" ns="6" title="File:TAdempiere init code.jpg" imagerepository="local">
        <imageinfo>
          <ii timestamp="2016-03-24T23:28:40Z" user="Maintenance script" anon="" />
        </imageinfo>
      </page>
    </pages>
  </query>
</api>