bug#35564: [PATCH v5] Tweak dired warning about "wildcard" characters

[Juri Linkov]

> A patch in bug#38076 replaces read-char-choice with
> read-char-from-minibuffer, and in one place in the patch
> it uses read-char-from-minibuffer in files--ask-user-about-large-file
> simply as
>
> (read-char-from-minibuffer
>   (concat prompt " (y)es or (n)o or (l)iterally ")
>   '(?y ?Y ?n ?N ?l ?L))
>
> Maybe it would be much simpler to use something like
>
> (read-char-from-minibuffer
>   (concat "1 occurrence of ‘?’ will not be substituted.  Proceed? (y)es or 
> (n)o or (h)elp ")
>   '(?y ?Y ?n ?N ?h ?H))

A better example is ask-user-about-supersession-threat in userlock.el
that using read-char-from-minibuffer displays such prompt:

  file changed on disk; really edit the buffer? (y, n, r or C-h) 

Please use a similarly short prompt:

  1 occurrence of ‘?’ will not be substituted.  Proceed? (y, n or ?) 

where '?' will show the Dired help window.

This will simplify the user interface to make it less confusing
(no more choice for two separate help texts).