 	/// Immediately calls passed in `action`.
 	///
 	/// - parameters:
-	///   - action: Closure of the action to perform.
+	///   - action: A closure of the action to be performed.
 	///
 	/// - returns: `nil`.
 	@discardableResult

	/// beginning at the given start time.
	///
	/// - parameters:
	///   - date: Date to schedule the first action for.
	///   - interval: Repetition interval.
	///   - leeway: Some delta for repetition interval.
	///   - action: Closure of the action to repeat.
	///
	/// - returns: Optional `Disposable` that can be used to cancel the work
	///            before it begins.

	/// When the work is executed depends on the scheduler in use.
	///
	/// - parameters:
	///   - action: The action to be scheduled.
	///
	/// - returns: Optional `Disposable` that can be used to cancel the work
	///            before it begins.
