removing space from grace notes

[Rune Zedeler]

Hi again :)
I think that too much space is added after a grace note, so I tried to
change that.
I tried

      \property Staff.GraceAlignment \override #'horizontal-space = #0.5

and

\paper{
    \translator { 
      \StaffContext
      GraceAlignment \override #'horizontal-space = #0.5
    }
}

but nothing happens.

-Rune