swift234

Fixing wrong method documentation for SetAlgebra (see my rdar://22031133)

Spot the error:

	/// Return true iff `self.intersect(other).isEmpty`.
	@warn_unused_result
	func subtract(other: Self) -> Self
	
	…
	
	/// Return true iff `self.intersect(other).isEmpty`.
	@warn_unused_result
	func isDisjointWith(other: Self) -> Bool

:wink: