Re: Issue 984 in lilypond: Noteheads don't merge when one of the voices contains a second

[lilypond]

Updates:
        Labels: -Patch-review Patch-needs_work

Comment #9 on issue 984 by address@hidden: Noteheads don't merge when  
one of the voices contains a second
http://code.google.com/p/lilypond/issues/detail?id=984

The "second example" in the second measure of ‘collision-head-chords.ly’ is
  << <c d> \\ <c d> >>
so our choices are to separate the chords completely or merge completely so  
that the stems are set on the same line.

The code uses the term stems-'touch' for the situation of  
stems-on-the-same-line, distinct from 'merge' when the stems are on either  
side of a column of merged heads.  The 'touch' case takes a different path  
through the code than the 'merge' case.

I suggest that merging a chord of seconds with another chord of seconds  
(making the stems 'touch') is outside the scope of this issue.