change soft to hard lines and back

[Uwe Brauer]

Hi

For email I start to use messages-are-flowing.el (for example in 
this message) which insert and display hardlines. (This is useful 
when sending message to devices with small screens since then the 
line ending is better displayed).

However sometimes it is a bit too much. So I still have a function 
which replaces softline by hardlines, namely

(defun harden-newlines () (interactive) 
 (save-excursion 
;    (goto-char (point-min)) 
   (mail-text) (while (search-forward "\n" nil t) 
     (put-text-property (1- (point)) (point) 'hard t)))) 

So I thought the inverse operation could be
(defun soften-newlines () (interactive) 
 (save-excursion 
;    (goto-char (point-min)) 
   (mail-text) (while (search-forward "\n" nil t) 
     (put-text-property (1- (point)) (point) 'soft t)))) 

But unfortunately this did not work out. I tried to google for the 
put-text-property function but did not find anything useful.

Somebody has an idea how to do that, replace hardlines again by 
softlines?

Thanks

Uwe Brauer