- "HOT" by itself will set the hot-spot attribute to the *current* attribute
  (just colorize the @-code in your editor the same as you do your cmd keys
  no need to memorize color-code mnemonics)
- "HOT:OFF" will turn off the hot-spot attribute through the end of the text or   util re-enabled
- Use a more greedy/liberal hot-spot matching algoirthm so that hot spots can overlap and the "best" one will be chosen. No way to opt-out of this algorithm (e.g. to use a conservative matching algo) currently.
- Earlier parse of @~ codes to keep text prestine (no parsing of |* or -*)