Issue 1297 in lilypond: Polyphonic TrillSpanners should be stacked accordingly to their Voice's position

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 1297 by v.villenave: Polyphonic TrillSpanners should be stacked  
accordingly to their Voice's position
http://code.google.com/p/lilypond/issues/detail?id=1297

% In the following example, the lower voice's trillspanner is placed
% *above* the upper voice's.  It should be placed below, thus matching
% the lower/upper Voice layout.

\version "2.13.36"

\new Staff <<
  \new Voice \relative c' { \voiceOne
    a''1\startTrillSpan a\stopTrillSpan
  }
  \new Voice \relative c' { \voiceTwo
    r2 a'\startTrillSpan a1\stopTrillSpan
  }


% This is technically an Enhancement, but since the current output
% isn't ideal, I'm making it a Defect.

Attachments:
        toto.png  1.2 KB