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>
    <allredirects garcontinue="Barry_Lubin|1408" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1689" ns="0" title="Dmitry Kostylev" />
      <page pageid="2083" ns="0" title="Babaeva &amp; Kostylev" />
      <page pageid="5479" ns="0" title="Eric Bates" />
      <page pageid="5480" ns="0" title="Tristan Nelson" />
      <page pageid="5481" ns="0" title="Alexandra Royer" />
      <page pageid="5698" ns="0" title="Cirque de Paris (Cuzent-Lejars)" />
      <page pageid="5699" ns="0" title="François Loisset" />
      <page pageid="7225" ns="0" title="Karina Bagdasarova" />
      <page pageid="7226" ns="0" title="Artur Bagdasarov" />
      <page pageid="7227" ns="0" title="Mikhail Bagdasarov" />
    </pages>
  </query>
</api>