title: Save WWW::Mechanize::File to disk using FileUtils
body: <p>Using Mechanize with Ruby I get a certain file using <code>agent.get('http://example.com/foo.torrent')</code>, with FileUtils or otherwise, how do I save this file to my hard drive (for instance, in a directory wherefrom the script is running)?</p>
  
  <p>P.S. <code>class =&gt; WWW::Mechanize::File</code></p>