modification of example printer show.rb to not require predefinition of variables
modification of example printer show.rb to not require predefinition of variables

git-svn-id: 6820a3256f06bff06633468177a63e22f486aec0@30 e0d2ef34-2163-4af7-bbef-dc9412234f94

jgoizueta/nio,jgoizueta/nio