Re: `message' not outputting the newline "atomically"

[Eli Zaretskii]

> From: Paul Eggert <address@hidden>
> Date: Sat, 22 Jun 2019 11:53:36 -0700
> Cc: Eli Zaretskii <address@hidden>, address@hidden, address@hidden
> 
> Andreas Schwab wrote:
> > On Jun 21 2019, Paul Eggert <address@hidden> wrote:
> > 
> >> it'll mess up formatting for the next stderr diagnostic, and (c) POSIX
> >> allows platforms to line-buffer stderr by default and Emacs has been
> >> working on such platforms for ages anyway.
> > 
> > How do you know?
> 
> Trivially, by using a recent Emacs master on GNU/Linux, as this uses 
> line-buffered stderr. It works fine.

That's not "for ages", though, is it?