bug#33694: 27.0.50; 'set-window-scroll-bars' broken

[Eli Zaretskii]

> Date: Tue, 11 Dec 2018 09:34:57 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: 33694@debbugs.gnu.org, monnier@iro.umontreal.ca
> 
>  >> Hmm...  'set-window-fringes' has the same problem.
>  >
>  > I can do the same there.  Anything else?
> 
> Since IIUC margins are handled differently I see no further issues.

OK, but can you give me a recipe for set-window-fringes?  In my
testing, the fringes are updated instantly after the call.

Thanks.