Ties and slurs going into repeat alternatives

[David Kastrup]

Hi,

at a line break, ties and slurs are cloned in order to reappear after
the line break.

The same cloning should happen for repeat alternatives: a slur or tie
that is started before the alternatives block needs to be present/cloned
at the start of _all_ alternatives, not just the first alternative.

Is there a routine that does most of the cloning business so that it is
reasonably easy to fix the behavior of \repeat volta?

-- 
David Kastrup