code: def email_quote_txt(text,
                      indent_txt='>>',
                      linebreak_input="\n",
                      linebreak_output="\n"):
      
      if (text == ""):
          return ""
      lines = text.split(linebreak_input)
      text = ""
      for line in lines:
          text += indent_txt + line + linebreak_output
      return text
docs: Takes a text and returns it in a typical mail quoted format, e.g.::
          C'est un lapin, lapin de bois.
          >>Quoi?
          Un cadeau.
          >>What?
          A present.
          >>Oh, un cadeau.
  
      will return::
          >>C'est un lapin, lapin de bois.
          >>>>Quoi?
          >>Un cadeau.
          >>>>What?
          >>A present.
          >>>>Oh, un cadeau.
  
      @param text: the string to quote
      @param indent_txt: the string used for quoting (default: '>>')
      @param linebreak_input: in the text param, string used for linebreaks
      @param linebreak_output: linebreak used for output
      @return: the text as a quoted string