bug#11338: 24.1.50; read-buffer-completion-ignore-case fails on one-character names

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: stephen.berman@gmx.net,  11338@debbugs.gnu.org
> Date: Tue, 08 Dec 2020 17:21:20 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > RET in the minibuffer invokes completion, doesn't it?
> 
> Not usually.  Try
> 
> emacs -Q
> C-x b *Me RET
> 
> You'll get a buffer called "*Me" without that being completed to
> "*Messages*".

But if I do

  emacs -Q
  C-x b
  C-h c RET

Emacs says that RET runs the command minibuffer-complete-and-exit.