Setting 'which-key-dont-use-unicode'

["Kévin Le Gouguec" <kevin.legouguec@gmail.com>]

Hello!

Paging help-gnu-emacs before filing a bug because I'm not sure of the
intended behavior.  After seeing 2024-06-18 "Disable usage of unicode
for which-key by default" (cc0a3a5f65b), I promptly went to my .emacs to
opt in to Unicode symbols, and was surprised to meet some resistance.

In an Emacs built from 2024-06-23 "; Fix typos" (fb11294d415) on the
emacs-30 branch, I tried

  (a) this .emacs:

    (use-package which-key
      :custom
      (which-key-dont-use-unicode nil)
      (which-key-mode t))

  (b) this .emacs:

    (custom-set-variables
     '(which-key-dont-use-unicode nil)
     '(which-key-mode t))

  (c) an empty .emacs, then

    M-x which-key-mode
    M-x toggle-option which-key-dont-use-unicode

  (d) a combination of this .emacs:

    (use-package which-key
      :custom
      (which-key-mode t))

  with this .emacs.d/early-init.el:

    (setq which-key-dont-use-unicode nil)

and only attempt (d) yielded which-key messages with '→' instead of ':'
for the separator symbol (resp. '…' instead of '..'  for truncation).

Wondering if I am doing something wrong (a definite possibility, the
perils of juggling ${HOME}s for repro purposes), if (d) really is the
intended way to effectively unset which-key-dont-use-unicode, or if this
is a potential bug report or feature request?