this is why there is a difference between TODO and XXX
XXX is old-school, "popularized in early Unix-related projects like the Berkeley Software Distribution (BSD)", and acted both as TODO and warning.
amazingly, now, we can simply have both!
- TODO is literally "do this before merging, or, make an issue"
- XXX is "gah this is a bug and i can't fix it right now. i am putting the XXX so it stands out from non-bug comments"
