\override Stem #'stroke-style = #"grace"
\longgrace d16( \endlonggrace
\revert Stem #'stroke-style }
- c8[) b16 c)]
+
+%% todo: should insert grace slur here.
+ c8[ b16 c)]
\grace {
\override Stem #'stroke-style = #"grace"
\longgrace c16 \endlonggrace