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From: Uwe Brauer <oub@mat.ucm.es>
Newsgroups: gmane.emacs.devel
Subject: Re: change soft to hard lines and back
Date: Fri, 15 Dec 2017 11:20:48 +0100
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Xref: news.gmane.org gmane.emacs.devel:221092
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Hi Jorge,


   > Hi, Uwe.
   > Uwe Brauer writes:


   > Probably this would work:

   > #+BEGIN_SRC emacs-lisp
   >   (defun soften-hardlines ()
   >     (interactive)
   >     (save-excursion
   >       (goto-char (point-min))
   >       (mail-text)
   >       (while (search-forward hard-newline nil t)
   >         (replace-match "\n"))))
   > #+END_SRC

It does, thanks, I did not know about search-forward hard-newline 
works also nicely.