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>
    <querypage name="Ancientpages">
      <results>
        <page value="20140617023655" timestamp="2014-06-17T02:36:55Z" ns="0" title="Wiki Contribution Contest" />
        <page value="20140617031707" timestamp="2014-06-17T03:17:07Z" ns="0" title="Jouer avec Google+ Hangouts" />
        <page value="20140731050936" timestamp="2014-07-31T05:09:36Z" ns="0" title="Module:Navbar" />
        <page value="20140731051054" timestamp="2014-07-31T05:10:54Z" ns="0" title="Module:HtmlBuilder" />
        <page value="20140815032905" timestamp="2014-08-15T03:29:05Z" ns="0" title="Aperçu général de la table" />
        <page value="20141229223357" timestamp="2014-12-29T22:33:57Z" ns="0" title="API:Guide d&#039;utilisation (Français)" />
        <page value="20141229223555" timestamp="2014-12-29T22:35:55Z" ns="0" title="Aligner une carte" />
        <page value="20141229223739" timestamp="2014-12-29T22:37:39Z" ns="0" title="Dés en 3D" />
        <page value="20141229224306" timestamp="2014-12-29T22:43:06Z" ns="0" title="Galerie" />
        <page value="20141229224701" timestamp="2014-12-29T22:47:01Z" ns="0" title="Paramètres d&#039;une page" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>