title: Retrieve `.vimrc` content used to initiate the current vim session
body: <p>After removing an old <code>.vimrc</code> (no backup) I realised that there were a few things I still need from it. I still have a couple of vim sessions open which used the old <code>.vimrc</code> file.</p>
  
  <p>Is there a way to output the contents of the <code>.vimrc</code> file that was used to initiate the current vim session?</p>