Given sth. like (or similar to):

```
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("FILES", nargs="+", type=str)
args = parser.parse_args()

```

Now I'd like to have the many-valued positional argument `FILES` displayed in the usage message as

```
usage: cli.py [-h] FILES

```

instead of

```
usage: cli.py [-h] FILES [FILES ...]

```

Any step-by-step explanations or pointers are appreciated.