Bad Subject folding (rfc2047) in 5.10.7 (was: Wrapping header fields)

[Reiner Steib <reinersteib+gmane@imap.cc>]

[ Taking this from gnu.emacs.gnus to the ding list. ]

On Wed, Mar 23 2005, Anders Wegge Jakobsen wrote:

>  I've discovered that sometimes the Subject: line in the header of
> outgoing messages are wrapped at an odd position, like this:
>
> Subject: 
>  Re: Forsvarsminister svært bevæbnet i Afghanistan
>
>  Probably because the subject is encoded:
>
>  =?iso-8859-1?q?Re:_Forsvarsminister_sv=E6rt_bev=E6bnet_i_Afghanistan? =
>
>  I'm not sure if that is legal or not, but as it has the effect that I
> can't see my own postings, I suspect that the same is true for others
> as well. So, what can I do about this?
>
>  Gnus v5.9.0

IIRC it is legal, but not good practice.

In the current development version, we get:

--8<---------------cut here---------------start------------->8---
ELISP> (and (require 'gnus) (require 'rfc2047) gnus-version)
"No Gnus v0.3"
ELISP> (with-temp-buffer
	 (insert "Subject: Re: Forsvarsminister svært bevæbnet i Afghanistan")
	 (rfc2047-encode-region (point-min) (point-max))
	 (buffer-string))
"Subject: Re: Forsvarsminister =?iso-8859-1?Q?sv=E6rt_bev=E6bnet?= i\n Afghanistan"
--8<---------------cut here---------------end--------------->8---

This is good.  But with the stable version (5.10.7 or from Emacs CVS),
we get folding directly after "Re: ":

--8<---------------cut here---------------start------------->8---
ELISP> (and (require 'gnus) (require 'rfc2047) gnus-version)
"Gnus v5.11"
ELISP> (with-temp-buffer
	 (insert "Subject: Re: Forsvarsminister svært bevæbnet i Afghanistan")
	 (rfc2047-encode-region (point-min) (point-max))
	 (buffer-string))
"Subject: Re:\n =?iso-8859-1?q?Forsvarsminister_sv=E6rt_bev=E6bnet_i_Afghanistan?="
--8<---------------cut here---------------end--------------->8---

We already considered to sync `rfc2047.el' in the stable branch with
the trunk version.  I hope Katsumi Yamaoka will find to do it, see
<http://thread.gmane.org/v93bvpyk3d.fsf%40marauder.physik.uni-ulm.de>.

Bye, Reiner.
-- 
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