Issue 1879 in lilypond: Packed-spacing works improperly with Mensural_ligature_engraver and Vaticana_ligature_engraver

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Ugly

New issue 1879 by address@hidden: Packed-spacing works  
improperly with Mensural_ligature_engraver and Vaticana_ligature_engraver
http://code.google.com/p/lilypond/issues/detail?id=1879

Marek Klein reports (NB I have not checked this and assume it's accurate):

Packed-spacing works improperly with Mensural_ligature_engraver and
Vaticana_ligature_engraver. See below:

http://gregoriana.sk/gg/wp-content/uploads/ligature.jpg
At the picture is the result of following code:
\version "2.14.1"

\markup "Mensural_ligature_engraver"
\score {
  \relative c' {
    \set Score.timing = ##f
    \[ c'\breve d e \] b1
    \[ e\breve d c \] e1
  }
  \layout {
    \context {
      \Voice
      \remove Ligature_bracket_engraver
      \consists Mensural_ligature_engraver
    }
  \context{
    \Score
    \override SpacingSpanner #'packed-spacing = ##t
    }
  }
}

\markup "Ligature_bracket_engraver"
\score {
    \relative c' {
    \set Score.timing = ##f
    \[ c'\breve d e \] b1
    \[ e\breve d c \] e1
  }
  \layout {
    \context{
      \Score
      \override SpacingSpanner #'packed-spacing = ##t
      }
  }
}

Here is the same problem in gregorian context:
http://gregoriana.sk/gg/wp-content/uploads/ligature-gg.jpg

\version "2.14.1"
\include "gregorian.ly"

\markup "Vaticana_ligature_engraver"
\score {
  \new VaticanaVoice \relative c'{
    \[ c d e \] c
    \[ e d c \] e
}
  \layout {
  }
}

\markup "Without ligature"
\score {
  \new VaticanaVoice \relative c'{
    c d e c
    e d c e
}
  \layout {
  }
}