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="20150223215446" timestamp="2015-02-23T21:54:46Z" ns="0" title="Saving files in JWf" />
        <page value="20150223225345" timestamp="2015-02-23T22:53:45Z" ns="0" title="Credits" />
        <page value="20150226071951" timestamp="2015-02-26T07:19:51Z" ns="0" title="Wiki Guide" />
        <page value="20150227172655" timestamp="2015-02-27T17:26:55Z" ns="0" title="Suggested features" />
        <page value="20150228201029" timestamp="2015-02-28T20:10:29Z" ns="0" title="Formatting Guide" />
        <page value="20150306234838" timestamp="2015-03-06T23:48:38Z" ns="0" title="FAQ" />
        <page value="20150307084044" timestamp="2015-03-07T08:40:44Z" ns="0" title="Manual Preferences" />
        <page value="20150307084809" timestamp="2015-03-07T08:48:09Z" ns="0" title="Manual StructureGen" />
        <page value="20150308021851" timestamp="2015-03-08T02:18:51Z" ns="0" title="Manual Introduction" />
        <page value="20150308042749" timestamp="2015-03-08T04:27:49Z" ns="0" title="Manual Flame Fractals" />
      </results>
    </querypage>
  </query>
</api>