Consider the following example from the Python documentation:

>>> parser = argparse.ArgumentParser(prog='PROG')
>>> parser.add_argument('--foo')
>>> parser.add_argument('command')
>>> parser.add_argument('args', nargs=argparse.REMAINDER)

Now show the help:

>>> parser.parse_args(['-h'])

This prints:

usage: PROG [-h] [--foo FOO] command ...

positional arguments:
  command
  args

Note that "args" is not shown in the synopsis. I suggest that the synopsis should instead say:

usage: PROG [-h] [--foo FOO] command args...