Lyric collides with staff line

[Phil Holmes]

I'm attaching 2 screenshots of output that I'm getting when typesetting part 
of the Gondoliers.  It's recitative, with a single note being used for lots 
of lyrics.  I've done this by joining the lyrics with underscores.  It looks 
to me like a regression, but before adding it to the tracker (and creating a 
tiny example to do so) could someone assure me I'm not doing something 
silly?

The 2.12 version was created using

\override PaperColumn #'keep-inside-line = ##t
\override NonMusicalPaperColumn #'keep-inside-line = ##t

which, of course, is no longer needed.

--
Phil Holmes
Bug Squad

LyricCollision2.13.56.png
Description: PNG image

LyricCollision2.12.png
Description: PNG image