in lib/twitter_cldr/utils/yaml.rb [323:338]
def is_printable?(ucs_code)
(
[0x09, 0x0a, 0x0d, 0x85].include?(ucs_code) ||
(ucs_code <= 0x7e && ucs_code >= 0x20) ||
(ucs_code <= 0xd7ff && ucs_code >= 0xa0) ||
(ucs_code <= 0xfffd && ucs_code >= 0xe000) ||
(ucs_code <= 0x10ffff && ucs_code >= 0x10000)
) &&
!(
@options[:escape_b_specific] &&
(ucs_code == 0x2028 || ucs_code == 0x2029)
)
end