Fix doctests in factorial_recursive function

The doctests in factorial_recursive were calling factorial() instead of factorial_recursive(). This fix ensures that the tests correctly validate the factorial_recursive function itself.

maths/factorial.py

@@ -41,13 +41,13 @@ def factorial_recursive(n: int) -> int:
  https://en.wikipedia.org/wiki/Factorial
 
  >>> import math
- >>> all(factorial(i) == math.factorial(i) for i in range(20))
+ >>> all(factorial_recursive(i) == math.factorial(i) for i in range(20))
  True
- >>> factorial(0.1)
+ >>> factorial_recursive(0.1)
  Traceback (most recent call last):
  ...
  ValueError: factorial() only accepts integral values
- >>> factorial(-1)
+ >>> factorial_recursive(-1)
  Traceback (most recent call last):
  ...
  ValueError: factorial() not defined for negative values