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>
    <alltransclusions gatcontinue="BE|70660" />
  </query-continue>
  <query>
    <pages>
      <page pageid="6520" ns="0" title="Who Wants to Be a Millionaire? (Формат)" />
      <page pageid="9947" ns="0" title="The Money Drop (Формат)" />
      <page pageid="10348" ns="0" title="The Weakest Link (Формат)" />
      <page pageid="14456" ns="0" title="1 vs. 100 (Формат)" />
      <page pageid="52194" ns="0" title="Identity (Формат)" />
      <page pageid="58588" ns="0" title="The Wall" />
      <page pageid="63191" ns="0" title="Family Feud (Формат)" />
      <page pageid="70653" ns="0" title="Wie wordt euromiljonair?" />
      <page pageid="97887" ns="0" title="Ke Hotey Chay Kotipoti" />
    </pages>
  </query>
</api>