# File cmd/teensy/cmd_edit.rb, line 67
  def word_wrap(s, len)
    str = s
    str.gsub!(/\n/,' ');str.squeeze!(' ')
    str.gsub!(/(\S{#{len}})(?=\S)/,'\1 ')
    str.scan(/(.{1,#{len}})(?:\s+|$)/).flatten.join("\n")
  end