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="20101019200723" timestamp="2010-10-19T20:07:23Z" ns="0" title="Informations TRB 2011" />
        <page value="20110720045053" timestamp="2011-07-20T04:50:53Z" ns="0" title="FeatureBasedTracking" />
        <page value="20111215180404" timestamp="2011-12-15T18:04:04Z" ns="0" title="TripPlanning" />
        <page value="20120221190922" timestamp="2012-02-21T19:09:22Z" ns="0" title="Liste des bourses pour les étudiants en Transports" />
        <page value="20120812222433" timestamp="2012-08-12T22:24:33Z" ns="0" title="Programming Naming Conventions" />
        <page value="20140326004530" timestamp="2014-03-26T00:45:30Z" ns="0" title="Expérimentation de systèmes d&#039;adaptation intelligente de la vitesse et d&#039;enregistreurs de données de vitesse" />
        <page value="20140326005523" timestamp="2014-03-26T00:55:23Z" ns="0" title="Expérimentation SAIV et EDV" />
        <page value="20140523164909" timestamp="2014-05-23T16:49:09Z" ns="0" title="Stratégie d&#039;expérimentation de SAIV et et d&#039;EDV" />
        <page value="20140606161915" timestamp="2014-06-06T16:19:15Z" ns="0" title="Ideas for Feature-basedTracking Improvements" />
        <page value="20140902045909" timestamp="2014-09-02T04:59:09Z" ns="0" title="Séminaire appliqué sur les outils informatiques de traitement de données" />
      </results>
    </querypage>
  </query>
</api>