bug#38457: 27.0.50; dabbrev-expand regression due to message change

[Eli Zaretskii]

> Date: Tue, 10 Dec 2019 18:34:48 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 38457@debbugs.gnu.org
> 
> The original problem was, AFAIU, that various minibuffer prompts
> become obscured by echo-area display of messages.  So one possible
> solution is to modify the subroutines of 'message', e.g.,
> set_message_1, to detect the conditions of the minibuffer being
> active, and insert the contents of the minibuffer into the echo-area
> buffer before the message text.  Does anyone see problems with this?

Juri, could you please share your opinion about this proposal?  you
worked on changes related to this issues a lot lately, so you probably
know about this more than anyone else.  Do you see any problem with
the above?  If workable, I think its advantage is that it minimizes
behavior changes, while preserving the main traits of the solution: to
avoid obscuring minibuffer prompts by asynchronous messages.

TIA