Broken `cherReplayingLatest` attempt.

cher_replaying_latest_attempt.swift

extension Publisher {
	func cherReplayingLatest() -> Publishers.CompactMap<
		Publishers.Autoconnect<
			Publishers.Multicast<
				Publishers.Map<Self, Output?>,
				CurrentValueSubject<Output?, Failure>
			>
		>,
		Output
	> {
		map(Optional.some) /// (1) To give the subject below an initial value, we can box upstream
		/// in an `Optional.some` and, later, compact `nil` values out.
			.multicast { CurrentValueSubject(nil) } /// (2) Swapping in a `CurrentValueSubject`.
			.autoconnect()
			.compactMap { $0 } /// (3) Dropping `nil`s.
	}
}