bug#63379: 29.0.60; Indentation not working properly in csharp-mode

[Eli Zaretskii]

> From: Theodor Thornhill <theo@thornhill.no>
> Cc: 63379@debbugs.gnu.org
> Date: Sat, 02 Sep 2023 19:17:12 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Easy reproduction: edit a csharp file, go to some toplevel line (e.g. 
> >> "using System;" that is pervasive
> >> in a lot of C# code) and run c-indent-line-or-region.
> >
> > Theo, could you please look into this?  TIA.
> >
> 
> Yeah, I think this is a simple enough fix.  Should I install this on
> master, 29 branch?

On emacs-29, please.

Thanks.