Re: Add function for overriding broken spanners to LilyPond. (issue 6397054)

[David Nalesnik]

David,

This use of \default for skipping optional arguments even in end
position may appear a bit contrived.

However, \key \default and \mark \default existed (hardwired in the
parser) even before music functions ever heard of optional arguments, so
I consider it an accomplishment to have made this preexisting syntax fit
into a coherent whole.

+1

(Thank you for the many improvements you've made! )

-David