disallow specifying multiple:true for boolean arguments

[bakkot]

multiple allows you to collect all the values for string arguments into an array. It doesn't do anything for boolean arguments. Best disallow it, I would think?

[shadowspawn]

Collecting an array of string arguments is the main use case, but an array of booleans can be used as an indirect counting feature. The classic use case is more verbose, like -vvv.

• refactor!: rework results to have parsedOptions property and store true in values for boolean options #80 (comment)

It doesn't do anything for boolean arguments. Best disallow it, I would think?

I think it does do something and no need to disallow? I do think of the boolean usage as somewhat of a side-affect of the string array support rather than a "real" feature, but in the absence of explicit support for counting options (which is not a common enough use case to have made the feature set), I think multiple is usable for that purpose.

[bakkot]

Oh, sorry I missed that conversation. If it's intentional, I'll just change this to be a test, then.