⌂ Controlling tuplet bracket visibility

The default behavior of tuplet-bracket visibility is to print a bracket unless there is a beam of the same length as the tuplet.

To control the visibility of tuplet brackets, set the property bracket-visibility to either #t (always print a bracket), if-no-beam (only print a bracket if there is no beam) or #f (never print a bracket). The latter is in fact equivalent to omitting the TupletBracket object altogether from the printed output.