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

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

Author: pre-commit-ci[bot]

backtracking/combination_sum.py

@@ -15,10 +15,10 @@
 """
 
 def backtrack(
-    candidates: list[int], 
-    path: list[int], 
-    answer: list[list[int]], 
-    target: int, 
+    candidates: list[int],
+    path: list[int],
+    answer: list[list[int]],
+    target: int,
     start_index: int
 ) -> None:
     """