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="20150301154327" timestamp="2015-03-01T15:43:27Z" ns="0" title="Panneaux solaires" />
        <page value="20150301160943" timestamp="2015-03-01T16:09:43Z" ns="0" title="Bouchons" />
        <page value="20150301165450" timestamp="2015-03-01T16:54:50Z" ns="0" title="Humidité ascensionnelle en thermographie" />
        <page value="20150301171441" timestamp="2015-03-01T17:14:41Z" ns="0" title="Vérification de panneaux solaires" />
        <page value="20150301222226" timestamp="2015-03-01T22:22:26Z" ns="0" title="Bien-être" />
        <page value="20150301223735" timestamp="2015-03-01T22:37:35Z" ns="0" title="Humidité dans une habitation" />
        <page value="20150301225011" timestamp="2015-03-01T22:50:11Z" ns="0" title="Recherche de la source d&#039;une infiltration dans un mur mitoyen" />
        <page value="20150301225413" timestamp="2015-03-01T22:54:13Z" ns="0" title="Trouver la source d&#039;une infiltration dans une dalle de terrasse" />
        <page value="20150301225818" timestamp="2015-03-01T22:58:18Z" ns="0" title="Thermographie" />
        <page value="20150301230106" timestamp="2015-03-01T23:01:06Z" ns="0" title="Infiltrations" />
      </results>
    </querypage>
  </query>
</api>