Brace expansion change on devel

[Sam James]

Hi,

Since the following commit on devel

      commit c3ca11424d2ae66cafa2f931b008dfb728e209a5
      Author: Chet Ramey <chet.ra...@case.edu>
      Date:   Wed Feb 12 11:18:16 2025 -0500
      fix issue with redirections to bash input file descriptor; new minimal 
chmod builtin; posix mode change for kill builtin return status; perform 
additional validation on brace expansion sequence expressions

the following behaves differently:
$ echo {a,../a.cfg}
{a,../a.cfg} # with devel

vs

$ echo {a,../a.cfg}
a ../a.cfg # with 5.2_p37

Does this constitute a valid sequence expression? The documentation
implies that even if not, an unquoted comma may be fine.

Quoting the first dot of .. suffices as a workaround:
$ echo {a,'.'./a.cfg}
a ../a.cfg

thanks,
sam