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>
    <pages>
      <page pageid="122" ns="0" title="Války klanů" />
      <page pageid="1151" ns="0" title="EpMMO skilly" />
      <page pageid="1192" ns="0" title="Skill Kovářství (EPMMO)" />
      <page pageid="1199" ns="0" title="Skill na Sekeru" />
      <page pageid="1200" ns="0" title="Skill na Meč" />
      <page pageid="1201" ns="0" title="Skill na Kladivo" />
      <page pageid="1202" ns="0" title="Skill na Luk" />
      <page pageid="1203" ns="0" title="Skill na Kuš" />
    </pages>
  </query>
</api>