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

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

Author: pre-commit-ci[bot]

Diff for: graphs/bidirectional_search.py

@@ -131,7 +131,7 @@ def bidirectional_search(
 def main() -> None:
     """
     Run example of bidirectional search algorithm.
-    
+
     Examples:
         >>> main()  # doctest: +NORMALIZE_WHITESPACE
         Path from 0 to 11: [0, 1, 3, 7, 11]
@@ -178,4 +178,4 @@ def main() -> None:
 
 
 if __name__ == "__main__":
-    main()
+    main()