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>
    <alllinks>
      <l ns="0" title="Compiling the firmware with Eclipse" />
      <l ns="0" title="Getting the firmware" />
      <l ns="0" title="Getting the firmware with Eclipse" />
      <l ns="0" title="Setting up a windows machine for compiling the firmware" />
    </alllinks>
  </query>
</api>