bug#13782: improved #! shebang support in elisp/emacs

[Glenn Morris]

Please keep the debbugs address cc'd. Resending your comments so that
they are more visible.

    Date: Fri, 22 Feb 2013 15:47:50 -0500
    From: Andrew Pennebaker <andrew.pennebaker@gmail.com>

    Stefan describes the error I experience. I use an assortment of computers
    and OS's, some throw this error and some do not.

    Emacs 24.2 for Windows does not throw an error (yay!)

    Emacs 24.x.y via Homebrew may throw this error (boo!)

Where x = ?
Where "may throw" means what? It sometimes does and sometimes doesn't?

Please give the full details, otherwise this is going to go nowhere.