# File lib/cheetah.rb, line 188
    def log_stream_increment(stream, data)
      @stream_buffer[stream] + data =~ /\A((?:.*\n)*)(.*)\z/
      lines = Regexp.last_match(1)
      rest = Regexp.last_match(2)

      lines.each_line { |l| log_stream_line(stream, l) }

      @stream_used[stream] = true
      @stream_buffer[stream] = rest
    end