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>
    <allfileusages gafcontinue="Babera.jpg|10195" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2313" ns="0" title="Baal Taran" />
      <page pageid="2320" ns="0" title="Baal Parvez" />
      <page pageid="2330" ns="0" title="Baal Namib" />
      <page pageid="2332" ns="0" title="Baal Orun" />
      <page pageid="2377" ns="0" title="Baal Isidro" />
      <page pageid="2378" ns="0" title="Baal Lukor" />
      <page pageid="2408" ns="0" title="Baal Kagan" />
      <page pageid="2481" ns="0" title="Babera" />
      <page pageid="11205" ns="0" title="Gurus" />
    </pages>
  </query>
</api>