Question about rf-string and r-string
I notice that I have used rf-strings in a few solutions, for example here: https://py.checkio.org/mission/double-substring/publications/Guest_5a80b5eb/python-3/first/
However, I notice that my "features used" progress tracker does not include rf-string or r-string. It does include f-string.
Does anyone know how exactly you get credit for rf-string? This seems to be a CheckiO bug.
I have tried submitting solutions with all of the following format:
newline = '\n' print( rf'1\100{newline}' rf"1\100{newline}" RF'1\100{newline}' RF"1\100{newline}" fr'1\100{newline}' fr"1\100{newline}" FR'1\100{newline}' FR"1\100{newline}")
All of these forms work, but none of them register rf-string as used.