-\new Staff \relative c' {
- \override Staff.StaffSymbol #'line-positions = #'(-5 -2 -1 2 5 6)
- \override Staff.StaffSymbol #'ledger-positions = #'(-5 (-2 -1) 2)
- \override Staff.StaffSymbol #'ledger-extra = #1
+\new Staff \relative {
+ \override Staff.StaffSymbol.line-positions = #'(-5 -2 -1 2 5 6)
+ \override Staff.StaffSymbol.ledger-positions = #'(-5 (-2 -1) 2)
+ \override Staff.StaffSymbol.ledger-extra = #1