follow-mode arg should be optional

[Robert Boyer <boyer@cs.utexas.edu>]

In follow.el, we read:

 (defun follow-mode (arg) ...

Maybe that arg should be &optional, so that it is
possible to put follow-mode in the first line of a
file, with, e.g.,

  -*- mode: follow; -*-

As it is now, I believe a wrong-number-of-arguments
error arises when the code that parses such first lines
tries to execute (follow-mode).  The error is masked to
some extent, but still shows up in a part of my screen.

Thanks so much for Emacs.  What a wondrous system --
one of the real seven wonders of the world.  Forced to
choose between Emacs and, say, any pyramid, I'd take
Emacs.

Bob


In GNU Emacs 21.2.1 (powerpc-apple-darwin, X toolkit)
 of 2006-03-22 on kodaira.local

configured using `configure powerpc-apple-darwin
--prefix=/sw --with-x --with-x-toolkit=lucid
--without-toolkit-scroll-bars --without-gif
'--infodir=${prefix}/share/info'
'--mandir=${prefix}/share/man'
'--libexecdir=${prefix}/lib''