spacing problem

[libero . mureddu3]

Hi!
In  the following snippet, that I'm using inside a latex file, there is a
lot of space at the beginning of the second bar. I'm also using others examples
that doesn't have this appereance.
There is something that I can do to make the fragment looking better?  Maybe
moving the barline?
Thanks for your help and suggestions.

Libero

lilypond 2.4.5
macosx 10.3.8
ibookg3800

\new PianoStaff <<
  \new Staff { \time 4/4 <c' e' a' bes'>4 <des' fis' bes' c''> <es' g' c''
des'\
'> <e' a' des'' es''> <fis' ais' dis'' e''> <g' c'' e'' fis''> <a' des''
fis'' \
g''> <bes' es'' g'' a''> \bar "||" }
  \new Staff { \clef bass c4 des es e fis g a bes }
>>