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="Billy_Smart" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bagdasarov Dynsty" missing="" />
      <page ns="0" title="Bauer Family" missing="" />
      <page pageid="2083" ns="0" title="Babaeva &amp; Kostylev" />
      <page pageid="1688" ns="0" title="Babaeva and Kostylev" />
      <page pageid="7224" ns="0" title="Bagdasarov Dynasty" />
      <page pageid="5697" ns="0" title="Baptiste Loisset" />
      <page pageid="5478" ns="0" title="Barcode Company" />
      <page pageid="182" ns="0" title="Barry Lubin" />
      <page pageid="4351" ns="0" title="Bez Noskov Trio" />
      <page pageid="314" ns="0" title="Bill Woodcock Elephants BAC 1986 Video" />
    </pages>
  </query>
</api>