bug#74709: [PATCH] Avoid empty unique qualifier in buffer name

[Visuwesh <visuweshm@gmail.com>]

[வெள்ளி டிசம்பர் 06, 2024] Manuel Giraud via "Bug reports for GNU Emacs, the Swiss army knife of text editors" wrote:

> Tags: patch
>
> Hi,
>
> This patch prevents from having an empty unique qualifier in the buffer
> name.  Maybe this could happen with others file buffer as well but, most
> of the time, you could witness it with Dired buffer in homedir.  Here is
> a recipe:
>
>   - emacs -Q
>   - C-x d /ssh:somewhere: ;; This buffer is named "~</ssh:somewhere:>"
>   - C-x d /~/             ;; This buffer is named "~<>"
>
> With this patch, the last buffer will simply be named "~" instead.

I usually have ~/tmp visited in a Dired buffer.  Sometimes I also visit
/tmp which gets named as "tmp<>".  With this patch, /tmp's buffer is
named "tmp" instead.  This confuses me as I am used to seeing "tmp" for
~/tmp's Dired buffer more often than not.  Can we gate this new
behaviour behind a user option please?