bug#35564: [PATCH v3] Tweak dired warning about "wildcard" characters

[Kévin Le Gouguec]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> I wouldn't bother with the read--propertize-prompt auxiliary
> function, but ... LGTM

Fair enough.  I figured having a function would reduce the inertia of
changing other prompts which are propertized rigidly, and make it easier
to (maybe, someday) change the face that these prompts use in one go.

Though it's probably better to wait for a few prompts to be adapted,
deduce some pattern in the way they are propertized, and then introduce
a new function to do the job.  I'll submit a revised patch without the
auxiliary function.