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

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

Author: pre-commit-ci[bot]

divide_and_conquer/power.py

@@ -27,7 +27,7 @@ def actual_power(a: int, b: int):
         return half * half
     else:
         return a * half * half
-        
+
 def power(a: int, b: int) -> float:
     """
     :param a: The base (integer).