add: line break

Author: JiHyeonSu

contains-duplicate/JiHyeonSu.py

@@ -2,4 +2,4 @@
 # 시간복잡도 및 공간복잡도 O(n)
 class Solution:
     def containsDuplicate(self, nums: List[int]) -> bool:
-        return len(nums) != len(set(nums))
+        return len(nums) != len(set(nums))