Gregorian episemas.

[Mirosław Doroszewski]

Placing episemas only over staff lines and... disappeared.

Example file:

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

\version "2.10.0"
\include "gregorian-init.ly"
\paper {
        #(set-paper-size "a4")
        #(layout-set-staff-size (* 18.0 pt))
        indent = 0 \mm
        between-system-space = #(* 0.1 mm)
        between-system-padding = #(* 0.1 mm)
}

\score {
        \new VaticanaStaff {
                \context VaticanaVoice = "cantus" {
                        \set VaticanaStaff.createSpacing = ##f
                        \override VaticanaStaff.StaffSymbol #'color = #red
                        \override VaticanaStaff.LedgerLineSpanner #'color = #red
                        \override Score.BarNumber #'transparent = ##t
                        \override Score.Clef #'extra-offset = #'(-0.75 . 0.0)
                        \clef "vaticana-do1"
                        \relative {
				\[ g \episemInitium \melisma \pes a \flexa g \episemFinis \melismaEnd  
\]
                                \[ a \episemInitium \pes b \flexa a 
\episemFinis \]
                                \finalis
                        }
                }
        }
}