bug#24206: 25.1; Curly quotes generate invalid strings, leading to a segfault

[Eli Zaretskii]

> Cc: schwab@linux-m68k.org, p.stephani2@gmail.com, johnw@gnu.org,
>  nicolas@petton.fr, 24206@debbugs.gnu.org
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Tue, 16 Aug 2016 10:37:39 -0700
> 
> Let's not cut the RC now, as unfortunately that patch fails spectacularly. (I 
> didn't test it yesterday; I tested your other patch, which is obviously 
> better.) 
> To reproduce the problem, run emacs -Q and "C-h f car RET"; Emacs will 
> display 
> "Wrong type argument: integer-or-marker-p, nil" instead of help.

Thanks, that blunder should be fixed now.

> The attached patch to emacs-25 fixes the problem. It makes the code 
> functionally 
> equivalent to the other of the 2 patches that you posted yesterday, and is 
> simpler. OK to install in emacs-25?

Sorry, no.  I don't want to indiscriminately convert unibyte strings
to multibyte in substitute-command-keys.