\override TextSpanner.style = #'solid
\override TextSpanner.font-size = #-5
\override TextSpanner.bound-details.left.stencil-align-dir-y = #CENTER
- \override TextSpanner.bound-details.left.text = \markup { \circle \number $StringNumber }
+ \override TextSpanner.bound-details.left.text =
+ \markup { \circle \number $StringNumber }
#})