bug#13672: Pretest 24.2.93: minibuffer doesn't go small again after a multi-line echo.

[Eli Zaretskii]

> Date: Sun, 10 Feb 2013 09:47:26 +0000
> From: Alan Mackenzie <acm@muc.de>
> 
> Emacs 24.2.93 pretest:
> 
> emacs -Q
> 
> Now display a multi-line output in the echo area, e.g. with
> 
> C-x C-f .emacs
> M-: imenu-generic-expression
> 
> .  M-x now clears the buffer, but fails to return it to a single line's
> height.  This is surely a bug.

Not a bug, but a deliberate behavior.  Emacs behaved like that by
default since v21.1.  What you want you can have if you customize
resize-mini-windows to have the value t; see the doc string for more
details.

The reason for the default value is to avoid the annoying up and down
jumps of the mode line when the echo area displays messages of
different length.