format_time

# File ext/psych/lib/psych/visitors/yaml_tree.rb, line 316
        def format_time time
          formatted = time.strftime("%Y-%m-%d %H:%M:%S.%9N")

          if time.utc?
            formatted += " Z"
          else
            zone = time.strftime('%z')
            formatted += " #{zone[0,3]}:#{zone[3,5]}"
          end

          formatted
        end