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

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Author: pre-commit-ci[bot]

strings/join.py

@@ -1,6 +1,8 @@
 """
 Program to join a list of strings with a separator
 """
+
+
 def join(separator: str, separated: list[str]) -> str:
     """
     Joins a list of strings using a separator