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"?>
    <allfileusages gafcontinue="B10025.jpg|54481" />
      <page pageid="2192" ns="0" title="Береза" />
      <page pageid="2432" ns="0" title="Бичий" />
      <page pageid="3636" ns="0" title="Брехливий" />
      <page pageid="5052" ns="0" title="Вибалок" />
      <page pageid="5061" ns="0" title="Вибачення" />
      <page pageid="15097" ns="0" title="Жалісливо" />
      <page pageid="22089" ns="0" title="Каламутитися" />
      <page pageid="27567" ns="0" title="Майор" />
      <page pageid="59301" ns="0" title="Тривати" />
      <page pageid="62338" ns="0" title="Халуззя" />