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>
    <allredirects garcontinue="Викиреальность|268" />
  </query-continue>
  <query>
    <pages>
      <page pageid="131" ns="0" title="Анатолий Серебряков" />
      <page pageid="143" ns="0" title="Serebr" />
      <page pageid="162" ns="0" title="АПЭ" />
      <page pageid="266" ns="0" title="Вр" />
      <page pageid="295" ns="0" title="Afinogenoff" />
      <page pageid="323" ns="0" title="Википедиан.Ру" />
      <page pageid="324" ns="4" title="Личный сайт Анатолия и Дрима:Описание" />
      <page pageid="327" ns="0" title="Wikipedian.ru" />
      <page pageid="345" ns="0" title="Дрим" />
      <page pageid="386" ns="0" title="Абсурдопедия на Викии" />
    </pages>
  </query>
</api>