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

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

Author: pre-commit-ci[bot]

graphs/blossom_algorithm.py

@@ -147,4 +147,4 @@ def maximum_matching_blossom(graph: List[List[int]]) -> List[tuple[int, int]]:
     """
     blossom = BlossomAlgorithm(graph)
     blossom.maximum_matching()
-    return blossom.get_matching_edges()
+    return blossom.get_matching_edges()