\version "2.22.1" \layout { \context { \ChoirStaff \consists Span_bar_engraver \override SpanBar.break-visibility = ##(#t #f #f) } }
... or, if you want to have the illusion of being able to talk to LilyPond in English, equivalently:
\layout { \context { \ChoirStaff \consists Span_bar_engraver \override SpanBar.break-visibility = #end-of-line-visible } } :-) Lukas