Proper inversion generation

[donRumata03]

Is that correct that there are only n inversions generated where n is the number of notes in the chord?

rust-music-theory/src/chord/chord.rs

Line 191 in 2e09fa3

notes.rotate_left(self.inversion as usize);

As far as I understand, there should be n! of them to produce all the permutations.

AFAIK, according to the music theory, there only exists the invariant that the notes in chords shouldn't contain spaces more than one octave and this reduces the number of inversions of a given chord starting for a given octave exactly n!