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

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Author: pre-commit-ci[bot]

data_structures/arrays/max_profit_one_transaction.py

@@ -26,6 +26,7 @@
 
 from typing import List
 
+
 def max_profit(prices: List[int]) -> int:
     """
     Calculate the maximum profit from at most one buy-sell transaction.
@@ -57,7 +58,6 @@ def max_profit(prices: List[int]) -> int:
     return max_profit_val
 
 
-
 # ---------------------------------------------------------------
 # Example Usage (For quick testing)
 # ---------------------------------------------------------------