For now can just have single test, given two random shuffle tensors a and b, [a shuffle b](https://github.com/datasig-ac-uk/RoughPy/issues/s) = a(s) b(s) where s is a signature. (migrated from RoughPy repo)
For now can just have single test, given two random shuffle tensors a and b, a shuffle b = a(s) b(s) where s is a signature.
(migrated from RoughPy repo)