[luatex] \hyphenpenalty not working

[Élie Roux]

> in the first pass there is no hyphenation at all, only the replace field
> is consulted so there is no reason to take that penalty into account

This makes sense! Though one can argue that an explicit \discretionary 
is not mandatorily an hyphen? The case of Gregorian scores is of course 
very specific, but it's part of the exceptions...

In any case, such a difference with the TeX algorithm should be documented!

Thank you,
-- 
Elie