class Rails::Generators::AppBase

def psych_gemfile_entry
  return unless defined?(Rubinius)
  comment = "Use Psych as the YAML engine, instead of Syck, so serialized " \
            "data can be read safely from different rubies (see http://git.io/uuLVag)"
  GemfileEntry.new("psych", "~> 2.0", comment, platforms: :rbx)
end