[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

recursion/factorial.py

@@ -2,6 +2,8 @@
 Fibonacci
 https://en.wikipedia.org/wiki/Fibonacci_number
 """
+
+
 def factorial(number: int) -> int:
     """
     Compute the factorial of a non-negative integer using recursion.