Well, OK, but the answer also addresses other cases such as function/method decoration, passing arguments to the decorator itself, and passing arbitrary arguments. I agree that it's a little verbose, and the excessive comments and examples do detract from the clarity of the answer a little, but it's an excellent answer, nevertheless, if only because it leaves no use cases unexplored (excepting class decoration, but that's sufficiently orthogonal, I feel).

Your answer isn't wrong, but as an exercise in pedagogy (which is the point of SO, or at least one of its major aims) it leaves a lot to be desired, and wouldn't garner many upvotes. Not everyone understands what the term "syntax sugar" (and really, shouldn't that be 'syntactic sugar'?) means.