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="20140805074539" timestamp="2014-08-05T07:45:39Z" ns="0" title="ヘルプ：用語の雛形（協議項目用）" />
        <page value="20140822072005" timestamp="2014-08-22T07:20:05Z" ns="0" title="新規ページ作成" />
        <page value="20140822103439" timestamp="2014-08-22T10:34:39Z" ns="0" title="執筆規約" />
        <page value="20140822103928" timestamp="2014-08-22T10:39:28Z" ns="0" title="利用者登録について" />
        <page value="20140828172305" timestamp="2014-08-28T17:23:05Z" ns="0" title="ヘルプ：用語の雛形（固定項目用）" />
        <page value="20140829072816" timestamp="2014-08-29T07:28:16Z" ns="0" title="名前空間について" />
        <page value="20140906075817" timestamp="2014-09-06T07:58:17Z" ns="0" title="管理方針" />
        <page value="20141118045322" timestamp="2014-11-18T04:53:22Z" ns="0" title="メインページ" />
      </results>
    </querypage>
  </query>
</api>