I don't know if the following is useful for the bug report so I am simply replying here as I found the described behavior annoying as well.
At the time I grabbed the most recent version of nroff.vim syntax file I could fine which I see is dated 2021 Mar 28. I placed it in $HOME/.vim/syntax/nroff.vim I see it checks for two variables both of which I enabled in my $HOME/.vim/vimrc: " Force extended highlighting for groff files. let b:nroff_is_groff = 1 " Display nroff space errors let nroff_space_errors = 1 I do edit some locally generated roff and MM files along with the occasional man file. The result is generally pleasing and consistent to me. - Nate -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Web: https://www.n0nb.us Projects: https://github.com/N0NB GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819
signature.asc
Description: PGP signature
