formatting fix to test_maestro_create_input_data

tests/data/test_maestro.py

@@ -179,14 +179,14 @@ def test_maestro_invalid_tracks_over_15_min(tmpdir: str) -> None:
 
 
 def test_maestro_create_input_data() -> None:
-    """ 
-    A commuted metadata file is included in the repo for testing. mirdata references the metadata file to 
+    """
+    A commuted metadata file is included in the repo for testing. mirdata references the metadata file to
     populate the tracklist with metadata. Since the file is commuted to only the filenames referenced here,
-    we only consider these when testing the metadata. 
+    we only consider these when testing the metadata.
     """
     data = create_input_data(str(MAESTRO_TEST_DATA_PATH))
     assert len(data)
 
     test_fnames = {TRAIN_TRACK_ID, VALID_TRACK_ID, TEST_TRACK_ID, GT_15M_TRACK_ID}
-    splits = set(map(lambda el: el[1], [d for d in data if d[0].split('.')[0] in test_fnames]))
+    splits = set(map(lambda el: el[1], [d for d in data if d[0].split(".")[0] in test_fnames]))
     assert splits == set(["train", "validation", "test"])