Fail gracefully for unassigned code points by returning the code point.
Fail gracefully for unassigned code points by returning the code point.

surfdome/twitter-cldr-rb,twitter/twitter-cldr-rb,twitter/twitter-cldr-rb,surfdome/twitter-cldr-rb,4414/twitter-cldr-rb,twitter/twitter-cldr-rb,4414/twitter-cldr-rb,surfdome/twitter-cldr-rb