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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20130912054759" timestamp="2013-09-12T05:47:59Z" ns="0" title="MS SQL" />
        <page value="20130912055032" timestamp="2013-09-12T05:50:32Z" ns="0" title="MS CAL" />
        <page value="20130915064114" timestamp="2013-09-15T06:41:14Z" ns="0" title="User Account Control" />
        <page value="20130916105023" timestamp="2013-09-16T10:50:23Z" ns="0" title="WW CAL" />
        <page value="20130917180016" timestamp="2013-09-17T18:00:16Z" ns="0" title="Advanced Development Studio" />
        <page value="20130919200335" timestamp="2013-09-19T20:03:35Z" ns="0" title="Software Toolbox" />
        <page value="20130920091733" timestamp="2013-09-20T09:17:33Z" ns="0" title="ArchestrA System Platform" />
        <page value="20130920110837" timestamp="2013-09-20T11:08:37Z" ns="0" title="OS Configuration" />
        <page value="20130920110900" timestamp="2013-09-20T11:09:00Z" ns="0" title="Platform remover" />
        <page value="20130921084806" timestamp="2013-09-21T08:48:06Z" ns="0" title="Архивирование данных" />
      </results>
    </querypage>
  </query>
</api>