Re: emacs-30 8064b2a6798: Document undocumented completion commands

[Eli Zaretskii <eliz@gnu.org>]

> From: Eshel Yaron <me@eshelyaron.com>
> Cc: emacs-devel@gnu.org
> Date: Mon, 06 Jan 2025 13:16:40 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Eshel Yaron <me@eshelyaron.com>
> >> Cc: emacs-devel@gnu.org
> >> Date: Sun, 05 Jan 2025 12:36:27 +0100
> >> 
> >> Eli Zaretskii <eliz@gnu.org> writes:
> >> 
> >> >> From: Eshel Yaron <me@eshelyaron.com>
> >> >> Cc: Eli Zaretskii <eliz@gnu.org>
> >> >> Date: Sun, 05 Jan 2025 09:06:04 +0100
> >> >> 
> >> >> >  DEFUN ("read-from-minibuffer", Fread_from_minibuffer,
> >> >> >         Sread_from_minibuffer, 1, 7, 0,
> >> >> >         doc: /* Read a string from the minibuffer, prompting with string PROMPT.
> >> >> > +While in the minibuffer, you can use \\<minibuffer-local-completion-map>\\[minibuffer-complete] and \\[minibuffer-complete-word] to complete your input.
> >> >> 
> >> >> This part isn't quite right: read-from-minibuffer does not provide
> >> >> completion with minibuffer-complete[-word] by default.
> >> >> 
> >> >> How about just dropping these references?
> >> >
> >> > Sorry, I don't want to drop them, they are important.
> >> >
> >> > Why do you say these are not supported by default?  I can use them in
> >> > "emacs -Q", so what did I miss?
> >> 
> >> Hmm, C-h f read-from-minibuffer now says "While in the minibuffer, you can
> >> use TAB and SPC to complete your input."  But read-from-minibuffer doesn't
> >> provide such completion, by default it uses minibuffer-local-map, in which
> >> both keys are self-inserting.  Do you see something different?
> >
> > Please help me make this accurate without losing the important
> > information about these commands.  Okay?
> 
> AFAICT it would be more accurate (and relevant) to mention these
> commands in the docstring of completing-read, not read-from-minibuffer.
> But they are also pretty well documented in both the Emacs manual and
> the ELisp manual, so I'm not sure I see the importance of mentioning
> them there as well...

Maybe you are right.  But can you help me a bit more by telling which
functions that enter the minibuffer install the two keymaps I
mentioned in the doc string, minibuffer-local-map and
minibuffer-local-completion-map?  Those are the functions in whose
minibuffer these commands can be used.

Thanks.