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

[Juri Linkov <juri@linkov.net>]

>>> 1. Why there is the verbose option “toggle [D]etails”
>>>    while just “[?]” should be enough.  For example, like
>>>    in query-replace typing ‘?’ displays the Help window,
>>>    just typing ‘?’ here could display the Dired Help.
>>
>> '?' is an automatic option added by read-multiple-choice.  It pops-up an
>> autogenerated buffer repeating the prompt and showing longer
>> descriptions for each option.
>>
>> I would have liked '?' to show what I ended up putting in the "details"
>> buffer; ideally read-multiple-choice would have an optional HELP-MESSAGE
>> argument that could be squeezed between the prompt and the key
>> description when showing the help buffer.
>
> '?' would be more preferable since this is the standard way to ask
> for additional information in Dired, for example, on error it shows:
>
>   Dired error--type ? for details
>
> where '?' shows the details.  dired-do-shell-command should do the same
> in its prompt.  read-multiple-choice could be changed to not add
> its own help option when a '?' is provided in its 'choices' arg.

I meant using the same logic as in 'read-answer':

          (if (assoc "help" answers)
              answers
            (append answers '(("help" ?? "show this help message"))))

i.e. if '?' is provided in the function argument then use it,
otherwise use the default value.