Feature request: allow squiggle lines for line spanners
Requested by a French-speaking user here: https://lists.gnu.org/archive/html/lilypond-user-fr/2021-10/msg00027.html
The currently supported styles for line spanners are
trill. It would be nice to support
squiggle-line as well, reusing the
\draw-squiggle-line markup commands.
https://lists.gnu.org/archive/html/lilypond-user-fr/2021-10/msg00028.html suggests a workaround working in the case of a text spanner without arrows.