bug#25000: 26.0.50; Ibuffer might compare marks case insensitively

[Eli Zaretskii]

> From: Tino Calancha <tino.calancha@gmail.com>
> Date: Wed, 23 Nov 2016 21:11:21 +0900
> 
> >From a6275e8e966c4f58e30f7aa3787557961385c6dc Mon Sep 17 00:00:00 2001
> From: Tino Calancha <tino.calancha@gmail.com>
> Date: Wed, 23 Nov 2016 21:04:31 +0900
> Subject: [PATCH] ibuffer: compare marks with EQ
> 
> * lisp/ibuffer (ibuffer-update-title-and-summary, ibuffer-redisplay-current)
> (ibuffer-buffer-name-face, ibuffer-unmark-all)
> (ibuffer-count-deletion-lines, ibuffer-buffer-names-with-mark):
> Use 'eq' instead of 'char-equal' when comparing mark characters (Bug#25000).
> ---
>  lisp/ibuffer.el | 28 ++++++++++++++--------------
>  1 file changed, 14 insertions(+), 14 deletions(-)

Thanks, but please add a test for this.