[2.2.6] --ignore-words-list Nd has no effect, "Nd" is still reported as a typo

[hartwork]

Hi!

Thanks for making and sharing codespell as Software Libre! 🙏 I'm happily using codespell in CI with libexpat (libexpat/libexpat#739).

I ran into an issue with recent codespell where two-letter word "Nd" in --ignore-words-list is ignored apparently. To reproduce:

# codespell --version
2.2.6

# cd "$(mktemp -d)"
# git clone --depth 1 https://github.com/tenox7/ttyplot
# cd ttyplot/
# codespell  --skip ./.git --ignore-words-list Nd
./ttyplot.1:6: Nd ==> And, 2nd

# sed -n 6p ttyplot.1
.Nd realtime terminal plotting utility

This seems like a bug in codespell?

For a workaround, is there some way I can make this work without sacrificing all typo detection for the man page?

Thanks and best, Sebastian

[DimitriPapadopoulos]

See #3210 which is itself a duplicate of a multitude of other issues.

[hartwork]

@DimitriPapadopoulos thanks for your reply! It took me a bit to understand #3210 and how it would be related to my case given title "Case-sensitivity of ignored words" but now it's clear that to ignore Nd (with uppercase "N") I need to pass --ignore-words-list nd (with lowercase "n"). Good to know!