Undesired MultiMeasureRest X position when clef change at end of measure

[Owain Evans]

Hi Bug-Lily,

MultiMeasureRest and  "clef change at end of measure" events in different 
staffs but same measure: undesired MultiMeasureRest X position.

MultiMeasureRest needs to be centered in this case. 
I.e. The rest's centring between the two barlines presides over the addition of 
the clef symbol. 

Gould p. 160: says "When the rest bar contains a clef, key signature or time 
signature, place the rest at the centre of the remaining blank space.


\version "2.20.0"
{
  \new StaffGroup
  <<
    \new Dynamics { s1-great s1-no s1-great s1-great }
    \new Staff  \relative c'' { \clef bass R1 \clef treble | g4 f e d \clef 
bass | c,,1 | R1 | }
    \new Staff  \relative c'' { R1 | R1 | R1 \clef bass | R1 | }
  >>
}

I am correcting this with:
        \once \override score.MultiMeasureRest.X-offset = 1.5 %but ofcourse 
varies 
        
Many thanks,

Owain Evans