argh.rb

# encoding: utf-8

Encoding.default_external = 'utf-8'
Encoding.default_internal = 'utf-8'
ENV["LANG"]               = 'en_US.UTF-8'

require 'psych' if ARGV.first == 'p'
require 'yaml'

puts 'hello: "h\xc3\xa4gar"'
__END__
data = YAML.load('hello: "h\xc3\xa4gar"')
p YAML.name
p data['hello'].encoding
p data['hello']
puts data['hello'