Re: Lyrics break estimation of vertical spacing

[Boris Shingarov]

> The estimated height for the whole system _should_ take into account the
 > fact that the lyrics can be squeezed between the systems. Have a look at
 > the comment in align-interface.cc:104 (which should get called as a
 > result of sys->pure_height()). The begin_of_line_extent should be zero
 > for lyrics, which should allow the lines to be close together in the
 > height-estimation procedure.
 
Ok, I just got one step forward in the dichotomy of where the bug is.
The begin_of_line_extent is zero.  Moreover, the problem is NOT
specific to lyrics, and is observed also if there are low notes.  So, I am
concentrating my attention on what's happening in the callers of
get_skylines().  (Need to understand now why these skylines are
part of "translation" and not "height").