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="20071003132805" timestamp="2007-10-03T13:28:05Z" ns="0" title="История создания регулярных выражений" />
        <page value="20080322081141" timestamp="2008-03-22T08:11:41Z" ns="0" title="Советы и подсказки" />
        <page value="20080329071506" timestamp="2008-03-29T07:15:06Z" ns="0" title="Идентификатор" />
        <page value="20080331125423" timestamp="2008-03-31T12:54:23Z" ns="0" title="Управление пакетами" />
        <page value="20080402083539" timestamp="2008-04-02T08:35:39Z" ns="0" title="Пространства имен" />
        <page value="20080405101614" timestamp="2008-04-05T10:16:14Z" ns="0" title="Применение регулярных выражений" />
        <page value="20080413091531" timestamp="2008-04-13T09:15:31Z" ns="0" title="Closure" />
        <page value="20080416145911" timestamp="2008-04-16T14:59:11Z" ns="0" title="Exception" />
        <page value="20080417053430" timestamp="2008-04-17T05:34:30Z" ns="0" title="Real" />
        <page value="20080417071117" timestamp="2008-04-17T07:11:17Z" ns="0" title="Int" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>