Improve missing_empty_line Rule

[kmeinh]

Remove Rule:

multiline_arguments

Reason:

This Rule was triggered for the following example:

UIView.animate(withDuration: 0.3, animations: {
	print("...")
}, completion: { (success: Bool) in
	print("---")
})

Rule intended to format the code like:

UIView.animate(
	withDuration: 0.3, 
	animations: {
		print("...")
	},
	completion: { (success: Bool) in
		print("---")
	}
)

Might be more logical but is not (yet) intended to be.

Modified Rule:

missing_empty_line

What has been modified:

This Rule was triggered whenever a closing Bracket was not followed by one of the following characters: \n, ., }, \t or . Since we opened up our rules on so-called one-liners (let map = [1, 2].map { "\($0)" }), this Rule needs modification.

Modification:

This Rule is now just triggering if there are empty lines between two closing curly Brackets (} ).

will trigger at:

class ABC {

	func test() {
		print("something")
	}

}

but not for:

let map = [1, 2].map { "\($0)" }
let map2 = [1, 2].map { "\($0)" }