# File lib/lumberjack/log_entry.rb, line 24
    def to_s
      buf = "[#{time.strftime(TIME_FORMAT)}.#{(time.usec / 1000.0).round.to_s.rjust(3, '0')} #{severity_label} #{progname}(#{pid})"
      if unit_of_work_id
        buf << " #"
        buf << unit_of_work_id
      end
      buf << "] "
      buf << message
    end