pcvs - Convert object to string (long version)
23 pcvs -> (23)
{3 2 mul dup} pcvs -> ({3 2 mul dup})
(hello) pcvs -> ((hello))
pcvs converts every object into a string (long version)
R Kupper by copy-and-modify from cvs
/var/www/debian/nest/nest-simulator-2.20.0/lib/sli/sli-init.sli