help text doesn't work properly in parameters with underscore

[iago1460]

The next code doesn't generate a help text:

@task(help={'include_author': 'Include author in the footer'})
def docs(ctx, include_author=False):
    """
    Docs generator
    """
    print("Documenting...")

$ inv --help docs
Usage: inv[oke] [--core-opts] docs [--options] [other tasks here ...]

Docstring:
  Docs generator

Options:
  -i, --include-author

But replacing the key "include_author" with "include-author" in the help dictionary works:

$ inv --help docs
Usage: inv[oke] [--core-opts] docs [--options] [other tasks here ...]

Docstring:
  Docs generator

Options:
  -i, --include-author   Include author in the footer

[bitprophet]

Nice catch, thanks. Sounds like a bug. Hopefully trivially fixed.

Slightly related to #398 as well, suspect both are fixable in the same spot or nearby spots.

[florisla]

#533 is a duplicate of this issue. 533 has a reference to here, but not the other way around (yet).

[bitprophet]

Fixed in #611.