bug#23827: 25.1.50; tab-width file-local variable has no effect in etc/HELLO

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Thu, 30 Jun 2016 18:39:11 -0400
> Cc: Eli Zaretskii <eliz@gnu.org>, 23827@debbugs.gnu.org
> 
> > get called.  It isn't clear to me where `major-mode', which presumably is
> > set to binary zeros when the buffer structure gets allocated, gets set to
> > `fundamental-mode'.
> 
> "grep -n fundamental_mode src/*.c" should give you the answer ;-)

This bug should closed, right?  At least I no longer see the original
problem on master.