`trailingCommas` false positives for parenthesized expressions (IMO)

[rgoldberg]

If a parenthetical expression contains multiple values, it is a tuple; if it contains only one value, it is a parenthesized expression, not a tuple.

I think trailingCommas reports false positives for parenthesized expressions:

func f() {
	_ = (
		[1] + [2] // error: (trailingCommas) Add or remove trailing commas in comma-separated lists.
	)
	.map(String.init)
}

Shouldn't there not be a trailing comma for parenthesized expressions?

Maybe this could be configurable by an option, but it could be hardcoded to not requiring commas there.