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>
    <alllinks galcontinue="XML_-_бронирование" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bugzilla:41869" missing="" />
      <page ns="0" title="Geo microformat" missing="" />
      <page ns="0" title="ID тура" missing="" />
      <page ns="0" title="M:MediaWiki:Common.css" missing="" />
      <page pageid="371" ns="0" title="XML - RuTraveller/Экспорт мест" />
      <page pageid="334" ns="0" title="CMS" />
      <page pageid="370" ns="0" title="XML - RuTraveller/Экспорт словарных данных" />
      <page pageid="270" ns="0" title="GET-параметры" />
      <page pageid="195" ns="0" title="ID пользователя AgentPassport" />
      <page pageid="434" ns="0" title="HTML" />
    </pages>
  </query>
</api>