`- note:` is not recognized?

[dduan]

trafficstars

This is a common-ish element. Should consider whether to check whitespace errors when it exists.

[dduan]

This should be very similar to throws and returns except it's always "ignored" in preferences, so it's actually simpler. Although some plumbing is needed in each level. I think this also put a bunch of repeating code into the count of 3, which probably calls for some refactorino.