collision between markups and music

[Nicolas Sceaux]

Lily used to move markups so that they do not collide with music. This
example is from Lily 2.5.2:

  <http://nicolas.sceaux.free.fr/lilypond/markup-offset-2.5.2.png>

With current LilyPond, the markups are not moved anymore. The same
example, running LilyPond from CVS:

  <http://nicolas.sceaux.free.fr/lilypond/markup-offset-2.5.12.png>

This looks like a regression, unless I'm missing something obvious?

The code can be reduced to the following snippet:

  %%\version "2.5.12"
  
  #(set-global-staff-size 14)
  \layout { raggedright = ##t }
  
  \new Staff <<
    \context Voice = "" \notemode {
      s4
      \clef alto 
      s2. ^\markup { "" \translate #(cons -4 2) \bold \huge Cornelia. }
      s2
      \clef treble 
      s2 ^\markup { "" \translate #(cons -4 2) \bold \huge Sesto. }
    }
    \context Voice = "" \notemode  {
      \set Voice . autoBeaming = ##f
      \override Staff . Clef #'full-size-change = ##t
      a'8 a' r fis' a' a' r bes' |
      g' g' r4 d''8 bes' bes' a'16 bes' |
    }
    \lyricsto "" \new Lyrics \lyricmode { 
      ne -- lia? Da pa -- ce all'
      ar -- mi! Do -- na l'a -- sta al
    }
  >>

The difference was already present in 2.5.7 it seems. I have no
working version between 2.5.2 and 2.5.7.

nicolas