nixfmt-rfc-style migrate to nixfmt & keep nixfmt-classic. #438
Description
Is your feature request related to a problem? Please describe.
Pr: NixOS/nixpkgs#425068 has forced the migration to nixfmt and nixfmt-rfc-style will be removed in future.
evaluation warning: nixfmt-rfc-style is now the default for the 'nixfmt' formatter.
'nixfmt-rfc-style' is deprecated and will be removed in the future.
We need to migrate to nixfmt, remove nixfmt-rfc-style & keep nixfmt-classic.
There is no alternatives that I could think.
Additional context
CC @NixOS/CI
I am considering to make a pr from DigitalBrewStudios fork.