Unit test: programlistingco.002

1 |The is the first line
  |In the fourth line a variant selector occurs
  |after the ⚠; it should not be counted.
  |123456789⚠︎1①234567890
5 |12345678901②234567890

The user probably expects the line range marks to line up, but they don’t. It’s not clear how to fix that.

  |12345678901234567890                                       ④
  |12345678901234567890                                       ④
  |123456789①01②23③4567890                                       ④
  |12345678901234567890                                       ④
  |12345678901234567890                                       ①
  |12345678901234567890                                       ①
  |123456789②01③23④4567890                                       ①
  |12345678901234567890                                       ①