documentation error

[dave k]

On http://lilypond.org/doc/v2.8/Documentation/user/lilypond/Jazz-combo.html

The score looks messed up.


Also, I was wonder why we have to do that nasty hack with 
sl = {
       \override NoteHead #'style = #'slash
       \override Stem #'transparent = ##t
     }
     nsl = {
       \revert NoteHead #'style
       \revert Stem #'transparent
     }

to get the slashes. It's a pretty common aspect of jazz notation -
why can this not be its own symbol? We wouldn't have to worry about
problems with collisions.