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

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

maths/is_power_of_four.py

@@ -5,6 +5,7 @@
 Space Complexity: O(1)
 """
 
+
 def is_power_of_four(n: int) -> bool:
     """Return True if n is a power of four (n > 0).
 
@@ -34,4 +35,5 @@ def is_power_of_four(n: int) -> bool:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()