split_words: allow numeric suffix in words

[tsotnikov]

Currently the split_words logic does not allow numerical suffixes in words
https://github.com/triaxtec/openapi-python-client/blob/v.0.9.1/openapi_python_client/utils.py#L14-L17

Applying sneak_case for a tag like "v1" it gets transformed into "v_1" .
It may be very subjective but in my opinion is ugly, and I would prefer that resulting output after applying sneak_case would be "v1".

As changing split_words is a breaking change (and may be arguable whether the number is part of the word or not) maybe one solution could be to make the behavior of split_words configurable via config file.

[dbanty]

I've had a few variations of this discussion now. Unfortunately there's no clear cut "best" way to do snake casing with numbers as sometimes it's appropriate to use a separate "word" and sometimes it's not. There is one open PR which will be landing in the next breaking version (#413) which may make the behavior better for your case? But the goals at this point around casing are more about consistency than style, since style is so subjective.

[ramnes]

Yeah, #413 should keep both "V1" and "v1" as "v1" rather than "v_1".

[tsotnikov]

Thanks, #413 (not splitting all lowercase strings) looks good enough for me.