bug#23794: Emacs bug #23794; sort-line behavior regressed from prior Emacs versions

[Eli Zaretskii <eliz@gnu.org>]

> From: Robert Weiner <rsw@gnu.org>
> Date: Sun, 19 Jun 2016 12:51:08 -0400
> Cc: Drew Adams <drew.adams@oracle.com>, Richard Stallman <rms@gnu.org>, 
> 	emacs-devel <emacs-devel@gnu.org>, 23794@debbugs.gnu.org
> 
> On Sun, Jun 19, 2016 at 12:30 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>  Didn't think that far, but is it really clean for sort-lines to have
>  special code for some major mode? I thought a better way is to
>  override the default behavior by having sort-lines call functions
>  through funcall or somesuch, and then outline modes could set the
>  appropriate variable to the function of their liking?
> 
> The problem with that approach is that each mode has to be aware of this and add a setting, really not much
> different than each mode having its own sort function or way of calling a sort function. It is much more useful
> to centralize the behavior within the sorting library, even if it adds some conditional complexity to the code.

Not necessarily: if you set that up in outline-mode, all of its
descendants will inherit the setting for free.

> Here is the suggested patch to do it this way. -- Bob

Thanks, I hope others will comment on this.