title: redirection and vim
body: <p>I was wondering if there's a way to see the output of any command,
  straight inside vim, rather than first redirecting it into  a file and
  then opening that file.</p>
  
  <p>E.x. I need something like
  $  gvim &lt; <code>diff -r dir1/ dir2/</code></p>
  
  <p>This gives ambiguous redirect error message</p>
  
  <p>I just want to see the diffs between dir1 and dir2 straight inside
  gvim.</p>
  
  <p>Can any one provide a nice hack?</p>