Comment #3 on issue 2801 by [email protected]: Patch: Approximates
cross-staff slurs in VerticalAxisGroup vertical-skylines.
http://code.google.com/p/lilypond/issues/detail?id=2801
This newest incarnation of the patch compiles Keith's test-case cleanly:
http://www.mutopiaproject.org/cgibin/piece-info.cgi?id=1776
It also does a better job with the regtest I added.
I have no clue why there is a regtest diff with a tab voice example (it's
the only one) and as I can't actually see anything that's changed it's hard
for me to make heads or tails of it. I'm not bothered by it if no one else
is.
If people dig this approach, the same thing can be done for all cross-staff
spanners (beams, tuplet-brackets, etc.).