Cross Staff Stems

[Alberto Simões]

Hello

While the documentation explains that these vars need to be changed in
order to produce croll-staff stems:

        % stems may overlap the other staff
        \override Stem #'cross-staff = ##t
        % extend the stems to reach other other staff
        \override Stem #'length = #12
        % do not print extra flags
        \override Stem #'flag-style = #'no-flag

There isn't any hint on how to turn it off.
While I guess that the first variable should be turned off ##f,
there isn't information about the default length.

Also, I tried to do this lexically, using { } to delimit this portion,
but it seems this is not properly Perl :)

Any help is welcome.
Thanks
Alberto
-- 
Alberto Simões - Departamento de Informática - Universidade do Minho
                 Campus de Gualtar - 4710-057 Braga - Portugal