notation.itely: pipe example fails to build

[Graham Percival]

This example fails to build, but AFAIK the actual pipeSymbol
stuff is fine.  If I delete everything before the pipeSymbol (including
the { ), it works.  But if I leave anything in front of it like #(set! 
or
\paper {}, it fails.  I can't figure out how to fix this -- or rather, 
I can
figure out how to fix this file (delete almost everything), but I'm
not certain how to fix the portion of the manual:

-----
@lilypond[quote,fragment,raggedright,verbatim]
pipeSymbol = \bar "||"

{ c'2 c' | c'2 c }
@end lilypond
----
This example produces:
----
%% Generated by lilypond-book
%% Options: [quote,fragment,raggedright,verbatim]
#(set! toplevel-score-handler ly:parser-print-score)
#(set! toplevel-music-handler (lambda (p m)
                               (ly:parser-print-score
                                p (ly:music-scorify m p))
                            ))

\bookpaper {
    linewidth = 160 \mm - 2.0 * 9.0 \mm


    indent = 0.0\mm
    raggedright = ##t
}
\paper {
}


    {
        pipeSymbol = \bar "||"

{ c'2 c' | c'2 c }
    }
----