Duplicate content in click command help output

Describe the bug

The output of help for commands created with click contains duplicate content and is sometimes oddly formatted.

How To Reproduce

Create a bot with the following listener:

@listen_to("dummy")
@click.command(
    context_settings=dict(
        allow_extra_args=True,
    ),
)
@click.option(
    "-o",
    "--opt",
    type=str,
    help="Help text for option",
)
@click.argument("args", nargs=-1)
def dummy(
    self,
    message,
    opt: str,
    args: List[str],
) -> None:
    """A description of the command

    More information here
    """

    return

Send the message dummy --help. This leads to the following (correct) output on the CLI of the bot:

Usage: MyPlugin [OPTIONS] [ARGS]...

  A description of the command

  More information here

Options:
  -o, --opt TEXT  Help text for option
  --help          Show this message and exit.

However, in Mattermost the following response is sent:

Expected behavior

The help text defined in the docstring should only be shown once and formatted consistently (ie. not mixing regular and verbatim text)

Operating Environment (please complete the following information):

mmpy_bot Version: 2.2.1
mattermostdriver/mattermostautodriver Version: 7.3.2/1.2.0
Mattermost Server Version: 7.4
Python Version: 3.9
OS: Linux

Additional context

attzonko / mmpy_bot

Duplicate content in click command help output #362