Update prepare_mds_ed_dataset.py

prepare_mds_ed_dataset.py

@@ -222,11 +222,11 @@ def build_arg_parser() -> argparse.ArgumentParser:
     p.add_argument("--tasks", nargs="+", choices=TASKS, default=list(TASKS),
                    help="Which task families to generate. Default: all.")
     p.add_argument("--balanced-splits", nargs="*", choices=SPLITS,
-                   default=["train", "val"],
+                   default=["val"],
                    help="Splits whose majority class should be downsampled to "
                         "match the minority class per condition. Splits not "
                         "listed here keep the original prevalence. "
-                        "Default: train val (test kept unbalanced).")
+                        "Default: val (train and test kept unbalanced).")
     p.add_argument("--merge", action="store_true",
                    help="After generation, merge per-task JSONs into <split>.json.")
     p.add_argument("--no-generate", action="store_true",