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

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Author: pre-commit-ci[bot]

maths/factorial_recursive.py

@@ -4,6 +4,7 @@
 Reference: https://en.wikipedia.org/wiki/Factorial
 """
 
+
 def factorial(number: int) -> int:
     """
     Calculate the factorial of a non-negative integer recursively.