8.1.3 Text marks

[Graham Percival]

Hi guys,

This code from the docs is supposed to right-align the mark, but it 
doesn't work.  What's up?

{
\override Score.RehearsalMark
       #'break-visibility = #begin-of-line-invisible
     c1 c c c4 c c c
     \once \override Score.RehearsalMark #'self-alignment-X = #right
     \mark "D.S. al Fine "
}