tables in `--argument` help strings would be nice

[mdengler]

It would be nice if tables in help came out well:

    parser.add_argument(
        "--arg",
        help="""
            This same feature would be useful for arguments that would
            benefit from
            more explanation.

              1. It looks nicer
              2. It is easier to read, even if some of the bullets get to be a little long.
              3. Also, there is a table:
                 | Feature      | ParagraphFormatter | FlexiFormatter |
                 | :---         | :---:              | :---:          |
                 | Outputs text |        Yes         |       Yes      |
                 | Bullets?     |        Yes         |       Yes      |
                 | Tables       |        No          |       Yes      |
              4. Bullets can follow tables.

        """,  # noqa
    )

...should render like:

************************
Using the Flexi formatter
*************************

usage: flexidemo.py [-h] [--arg ARG]

optional arguments:
  -h, --help  show this help message and exit
  --arg ARG   This same feature would be useful for arguments that would benefit from more explanation.
               
                1. It looks nicer
                2. It is easier to read, even if some of the bullets get to be a little long.
                3. Also, there is a table:
                        | Feature      | ParagraphFormatter | FlexiFormatter |
                        | :---         | :---:              | :---:          |
                        | Outputs text |        Yes         |       Yes      |
                        | Bullets?     |        Yes         |       Yes      |
                        | Tables       |        No          |       Yes      |
                4. Bullets can follow tables.

This is a multi-paragraph epilog. It is presenting data that would benefit by being visually broken up into pieces.