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="Basic_Mercurial_Workflow" />
  </query-continue>
  <query>
    <pages>
      <page pageid="16546" ns="0" title="Ban" />
      <page pageid="189892" ns="0" title="Barre des statistiques" />
      <page pageid="51993" ns="0" title="Bartender" />
      <page pageid="101063" ns="0" title="Base conoscenza italiano" />
      <page pageid="101053" ns="0" title="Base de conhecimento" />
      <page pageid="40343" ns="0" title="Base de connaissances" />
      <page pageid="101073" ns="0" title="Base de conocimientos" />
      <page pageid="10313" ns="0" title="Basic Account Management/ko" />
      <page pageid="3502" ns="0" title="Basic Encryption Modules" />
      <page pageid="198434" ns="0" title="Basic Leash" />
    </pages>
  </query>
</api>