bug#38818: Dired: mention deleting buffers, not just windows

[Eli Zaretskii]

> From: 積丹尼 Dan Jacobson <jidanni@jidanni.org>
> Cc: Pieter van Oostrum <pieter-l@vanoostrum.org>,  rms@gnu.org,  
> michael_heerdegen@web.de,  38818@debbugs.gnu.org
> Date: Mon, 06 Jan 2020 02:19:03 +0800
> 
> Sounds like RMS's personal CJK-mangling mail system. But he doesn't have time 
> to fix it.

It isn't just RMS's email, it's also your email: it claims to be
text/plain and doesn't state any charset, but comes with a non-ASCII
name.