tuplets with colons e.g. 7:6

If you want to see tuplet numbers with colons (e.g. 7:6 instead of just 7) then be sure to create them with rational numbers when entering a rthm-seq. For example:

  (5 ((1 ((((3 4) { 7/6 (28/3) - 28/3 x 6 - }))))))

I've known this to help fix beaming problems. E.g. When I write the above example with just 7 I get unbeamed 1/4 notes by default; by writing 7/6 they are notated as beamed 1/8 notes, which is what we want.