bug#58193: 29.0.50; Screen flickers on with-locale-environment

[Eli Zaretskii]

> From: Pedro Andres Aranda Gutierrez <paaguti@gmail.com>
> Date: Mon, 3 Oct 2022 07:37:56 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>, 58193@debbugs.gnu.org
> 
> On that side good. On the other hand, I still think that a macro only 
> controlling the system-locale for the time
> functions may be useful despite, I admit, being somehow redundant. My feeling 
> is that many of the settings
> changed in with-locale-environment don't need to be changed for 
> format-time-string. 

What's wrong with

  (let ((system-time-local SOME-LOCALE))
     DO-SOMETHING)

> Digression: What about adding a third (optional) parameter to 
> format-time-string to set the locale for a
> specific call?

How is that different from

   (let ((system-time-local SOME-LOCALE))
     (format-time-string ....))