[luatex] Hyphen character in tibetan

[Elie Roux]

Hello,

does anyone know the solution to this problem? Is it possible to have 
lines broken after a certain character and the keep this character at 
the end of the lines? With \exhyphenchar or something? (\exhyphenchar 
doesn't do that anymore)

Or is it possible to write a quite simple macro for it without 
registering something in the hyphenation callback?

Thank you,
-- 
Elie