bug#28412: 26.0.50; Let save-some-buffers accept write-contents-functions

[Eli Zaretskii]

> From: Eric Abrahamsen <eric@ericabrahamsen.net>
> Cc: Kaushal Modi <kaushal.modi@gmail.com>,  28412@debbugs.gnu.org
> Date: Mon, 18 Sep 2017 12:12:01 -0700
> 
> Also, there don't appear to be any built-in functions or regexps for
> dealing with "hidden" buffers, I'm assuming:
> 
> (not (string-prefix-p " " (buffer-name buffer)))
> 
> is okay?

Yes, but I think aref would be simpler (and probably faster).