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 arcontinue="Workshop_RITMARE_27/28_gennaio_2014" />
  </query-continue>
  <query>
    <allredirects>
      <r ns="0" title="GSK" />
      <r ns="0" title="Getting Started" />
      <r ns="0" title="Help Editing Metadati dei Dataset" />
      <r ns="0" title="INSTALLAZIONE SK-1.2" />
      <r ns="0" title="Meeting DevelopmentTeam SK - 10-03-2014" />
      <r ns="0" title="Meeting SP7 - 14/15-11-2013" />
      <r ns="0" title="Prova2" />
      <r ns="0" title="Ritmare interface: UC1-6" />
      <r ns="0" title="Ritmare interface: Use Cases" />
      <r ns="0" title="Workshop RITMARE 27/28-01-2014" />
    </allredirects>
  </query>
</api>