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

[Eli Zaretskii]

> Date: Fri, 18 Aug 2023 12:27:47 +0000
> From: Heime <heimeborgia@protonmail.com>
> Cc: uzibalqa <uzibalqa@proton.me>, 65348@debbugs.gnu.org
> 
> > > > Then you will have to override the value of
> > > > minibuffer-default-add-function with a function of your own.
> > > 
> > > You see how things have become even more complicated now. How about
> > > providing the feature that there was ?
> > 
> > I explained above why this happens, so there's no need to reiterate.
> 
> Why have users make new functions to override the value of 
> 'minibuffer-default-add-function' when you can have the sensible feature
> that many would like to use available !  

Because it is needed to support the new enhancements.