Click.option-s should have help text

[ulziibay]

What?

Add help text to click.option

Why?

Click.option should ideally have a help text defined to be useful.

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[mdickinson]

Thank you for this contribution! I took the liberty of reverting the import changes, to keep this PR focused on a single thing.

Merging as soon as the continuous integration completes.

[mdickinson]

By the way, I was looking at this yesterday and considering removing the "environment" option altogether. Is it something that you've found useful to have available?

[corranwebster]

Not for traits, but I have been using the --environment option for traitsui's etstool to create longer-lived environments that don't get removed when running the full test suite.

[ulziibay]

Thanks @mdickinson for the thumbs up.

Is it something that you've found useful to have available?

I am not sure. I think you need this option still to be able to pass to the edm calls!