is_per_tone
is_per_tone(mark: Mark)Whether mark belongs to one tone of a chord, as a fingering does, rather than to the chord, as a staccato does.
>>> is_per_tone(scoring.fingering_2), is_per_tone(scoring.staccato)
(True, False)
>>> is_per_tone(Mark(name="fret 3", kind=MarkType.FINGERING))
True