bug#65348: INITIAL-INPUT in completing-read repeats same entry twice consecutively

[Heime via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

------- Original Message -------
On Saturday, August 19th, 2023 at 3:16 AM, Drew Adams <drew.adams@oracle.com> wrote:


> > > You can have it there. It does work.
> > 
> > But you are designating it as deprecated, which makes
> > others think that something awful is going to happen to it.
> 
> 
> Agreed. Better to not deprecate it and just explain
> the pros and the cons. However, Emacs deprecated it
> long ago...
> 
> Deprecation shouldn't be used for this kind of
> stylistic choice. For that, when those deciding
> agree on what's the best style, and they agree that
> it's helpful to pass along their suggestion in the
> interest of consistency (for example), then it can
> be advertised as a stylistic convention.
> 
> IMHO, there was never any call for this to be
> branded as "deprecated". I said so at the time,
> but other voices prevailed. History.
> ___
> 
> 
> [FWIW, Icicles considers it not deprecated. The doc
> string of `completing-read' in Icicle mode has this: INITIAL-INPUT is considered deprecated by vanilla Emacs, but not by Icicles. If INITIAL-INPUT is nil and DEF is non-nil, the user can use` next-history-element' to yank DEF into the
> minibuffer.
> 
> In addition, with Icicles users can choose the
> behavior they prefer wrt inserting the DEFAULT
> value, showing it in the prompt, and selecting it
> if inserted.
> 
> See https://www.emacswiki.org/emacs/Icicles_-_Customization_and_General_Tips#icicle-default-value.
> 
> ]
> 
> > The introduction of HIST is only making a good
> > function quite terrible to use, becoming an
> > over-engineering piece of junk to avoid.
> 
> Useless to claim, without saying why you think so.
> And you're quite wrong here, FWIW. HIST is your
> friend.

When using my own function that selects from a collection, I am never 
interested in the history.  Just want it to cycle through the entries,
that's all.  And the less things I got to type, the better.
 
> [But minibuffer history too can be improved for users:
> https://www.emacswiki.org/emacs/Icicles_-_History_Enhancements.
> ]
> 
> > > > I find using INITIAL quite useful because the
> > > > user sees something filled up.
> 
> 
> Yes. More importantly, it's there for you to edit.
> 
> As with everything else, inserting it isn't always
> a plus or always a minus, and different users can
> find it a plus or minus in the same context.
> 
> Callers of `completing-read' can decide whether it
> makes sense (they think) to insert. And users
> should be able to override the caller's choice.

It seems that now I have to know all about the HIST things,
the DEF, the over-riding of same value to call some function 
that I have to write to get the behaviour I was using, etc. 
 
> > Having the user yank it from the default to the
> > minibuffer is a bother
> 
> 
> Having it inserted automatically can also be a
> bother. Different contexts (different calls to
> `completing-read') can call for different behavior,
> and different users can, and do, have different
> ideas about what behavior is more bothersome.

Right.  But if someone wants it displayed immediately, have
to use M-n becomes a bother.