Fix split name

imdb_pt.py

@@ -73,7 +73,7 @@ class Imdb(datasets.GeneratorBasedBuilder):
                 name=datasets.Split.TEST, gen_kwargs={"filepath": test_path, "split": "test"}
             ),
             datasets.SplitGenerator(
-                name="test-all", gen_kwargs={"filepath": test_all_path, "split": "test-all"}
+                name="test_all", gen_kwargs={"filepath": test_all_path, "split": "test_all"}
             ),
         ]