"origin" was accurate since ruff rules are currently always modeled
after one origin (except the Ruff-specific rules).
Since we however want to introduce a many-to-many mapping between codes
and rules, the term "origin" no longer makes much sense. Rules usually
don't have multiple origins but one linter implements a rule first and
then others implement it later (often inspired from another linter).
But we don't actually care much about where a rule originates from when
mapping multiple rule codes to one rule implementation, so renaming
RuleOrigin to Linter is less confusing with the many-to-many system.
Following up on #2018/#2019 discussion, this moves the readme's development-related bits to `CONTRIBUTING.md` to avoid duplication, and fixes up the commands accordingly 😄
I previously tried adding the #[test_case()] attribute macro and got
confused because the Rust compilation suddenly failed with:
error[E0658]: use of unstable library feature 'custom_test_frameworks': custom test frameworks are an unstable feature
which is a quite confusing error message. The solution is to just add
`use test_case::test_case;`, so this commit adds that line to the
example in CONTRIBUTING.md to spare others this source of confusion.
By default only E* and F* lints are enabled. I previously followed the
CONTRIBUTING.md instructions to implement a TID* lint and was confused
why my lint wasn't being run.
