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="20120819203717" timestamp="2012-08-19T20:37:17Z" ns="0" title="Безопасность на сервере" />
        <page value="20120819203751" timestamp="2012-08-19T20:37:51Z" ns="0" title="Настройка репозиториев" />
        <page value="20120820105425" timestamp="2012-08-20T10:54:25Z" ns="0" title="Настройка почтового сервера" />
        <page value="20120822233154" timestamp="2012-08-22T23:31:54Z" ns="0" title="Библиотеки XML-парсеров" />
        <page value="20120826033732" timestamp="2012-08-26T03:37:32Z" ns="0" title="Настройка VPN-сервера" />
        <page value="20120826034109" timestamp="2012-08-26T03:41:09Z" ns="0" title="Установка MySQL" />
        <page value="20120924032949" timestamp="2012-09-24T03:29:49Z" ns="0" title="Установка MediaWiki" />
        <page value="20120924033004" timestamp="2012-09-24T03:30:04Z" ns="0" title="Настройка MediaWiki" />
        <page value="20120924033325" timestamp="2012-09-24T03:33:25Z" ns="0" title="Выбор Хостинга" />
        <page value="20120924033342" timestamp="2012-09-24T03:33:42Z" ns="0" title="Биржи трафика" />
      </results>
    </querypage>
  </query>
</api>