ruff

cf419646 - [ty] Stop testing the (brittle) constraint set display implementation (#21743)

[ty] Stop testing the (brittle) constraint set display implementation (#21743) The `Display` implementation for constraint sets is brittle, and deserves a rethink. But later! It's perfectly fine for printf debugging; we just shouldn't be writing mdtests that depend on any particular rendering details. Most of these tests can be replaced with an equivalence check that actually validates that the _behavior_ of two constraint sets are identical.