(paper (ly:grob-paper grob))
(text (interpret-markup
paper
- (ly:grob-alist-chain grob (ly:paper-lookup paper 'text-font-defaults))
+ (ly:grob-alist-chain grob (ly:output-def-lookup paper 'text-font-defaults))
letter)))
(let ((x (/ (- (cdr (ly:stencil-extent slur 0))