Am 19.09.2016 um 19:01 schrieb Phil Holmes:
Generally, songs with lyrics are set with a ChoirStaff rather than a
StaffGroup. These do not have barlines spanning the space between
the staves, and so the problem does not occur.
IMHO: The LyricHyphen code in lilypond is able to handle only the most
simple cases in an acceptable way.
Simon showed how to whiteout barlines, but Krzysztof also asked about
aligning hyphens in verses. Have a look
at the attached pdf and compare Lilyponds output to the hand-engraved
original.