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

[Drew Adams]

> There are no plans to remove INITIAL-INPUT, if that's what you are
> asking.  We cannot possibly remove it, ever.  The argument is not
> deprecated; its _use_ is "deprecated" (a.k.a. "discouraged"), that's
> all.
> 
> There's no problem here.

So no change.  Good to hear!  (Not as good as
removing the stylistic stigma from INITIAL, but
good enough).  Thx.