Unit test: programlistingco.002

1The is the first line
In the fourth line a variant selector occurs
after the ⚠; it should not be counted.
123456789⚠︎1234567890
512345678901234567890

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

12345678901234567890                                       
12345678901234567890                                       
12345678901234567890                                       
12345678901234567890                                       
12345678901234567890                                       
12345678901234567890                                       
12345678901234567890                                       
12345678901234567890