Comment #68 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
Comment 65's multiple-pass suggestion might only need two passes:
1) tentatively shape cross-staff Slurs and Beams using the
minimum-distances that we compute just before stretching staves to fill the
page, including those tentative shapes in the System skylines only.
2) finalize the cross-staff spanner stencils after stretching staves to
fill the page.
