Correctly handle -m and -k flags

[wbolster]

Correctly handle -m and -k flags

Add a special reader helper to read shell arguments that should go after
a short-form pytest flag.

Fixes #36.

[wbolster]

@pkryger can i bug you for a review 🙏 since i'm not sure this is the best way to do this.

note that pytest does not have a --long-version for the -k and -m arguments, it seems.

[pkryger]

I think this is perfectly fine, and probably should be released as a fix to a non-working options.

What I'd consider would be:

• adding a :reader to quote args, so they display nicely in transient popup,
• probably reintroduce = in :argument, again for display purposes (otherwise the value is concatenated to the argument without a separator),
• update python-pytest--quote-string-option to only quote unquoted arguments and properly handle '=' sign.

[wbolster]

thanks! i updated my changes based on your suggestion, but i didn't fully understand them, and i couldn't make it work.

i ended up with a custom reader function that takes care of both the quoting and the spacing. it looks nice in the dispatcher modal (try -k, then type foo or bar), and produces a correct pytest -k 'foo or bar' command line.

(totally forgot about this for a while, until i hit the issue again recently.)

[pkryger]

I think this version is even nicer (and simpler!) than what I thought about.

[wbolster]

good to hear! thanks again for your review and ideas 🙏