[Bug?] Concatening syllables

[Juergen Reuter]

Hi,

Sect. 7.3.2 (Entering lyrics) of the manual says:

"In order to assign more than one syllable to a single note, you must 
surround them with quotes or use a _ character between the syllables."

This works fine e.g. for:
\addlyrics { gran- de_a- mi- go }

However, neither
\addlyrics { gran- \lyricmode { de }_a- mi- go }

nor
\addlyrics { gran- \lyricmode { de_ }a- mi- go }

nor
\addlyrics { gran- \lyricmode {"de"}_a- mi- go }

works as expected (the "_" just shows no effect at all).  I need this 
problem get fixed in order to get \versus, \responsum commands of ancient 
notation properly working, such that you can e.g. say:

\addlyrics { \versus_Here comes the text. }
(where \versus constructs a special char, see ly/gregorian-init.ly).

Any ideas?

Greetings,
Juergen