fixup! Format Python code with psf/black push

Author: github-actions

maths/prime_numbers.py

@@ -65,5 +65,6 @@ def primes(max: int) -> Generator[int, None, None]:
 
     # Let's benchmark them side-by-side...
     from timeit import timeit
+
     print(timeit("slow_primes(1_000_000)", setup="from __main__ import slow_primes"))
     print(timeit("primes(1_000_000)", setup="from __main__ import primes"))