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[Mutt] #3135: cannot stop header wrap/folding; wrapping ignores user $wrap setting

#3135: cannot stop header wrap/folding; wrapping ignores user $wrap setting
-----------------------------------------------------+----------------------
 Reporter:  idallen                                  |       Owner:  mutt-dev
     Type:  defect                                   |      Status:  new     
 Priority:  minor                                    |   Milestone:          
Component:  mutt                                     |     Version:  1.5.18  
 Keywords:  wrap header fold folding terminal width  |  
-----------------------------------------------------+----------------------
 Some time after 1.5.13, mutt started concatenating and wrapping long
 header lines on blanks, using the current terminal width, even if you
 set $wrap to zero, even if you set $wrap to a large value such as 200.

 This new behaviour ruins the ability to read SpamAssassin reports, since
 the reports are always re-formatted into an unreadable mess based on the
 current terminal width ("COLS"), and nothing can prevent this mangling:


 {{{
 X-Spam-Report: -1.6
         *  0.0 HTML_IMAGE_RATIO_08 BODY: HTML has a low ratio of text to
 image
         area * -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% *
         [score: 0.0000] *  1.0 HTML_MESSAGE BODY: HTML included in message
 }}}


 The mangling happens regardless of whether the builtin pager is used
 or an external pager is used.  The mangling happens before the pager
 gets the text; since, resizing the window doesn't change the mangling.
 (To show a different mangling, you have to resize your terminal window,
 then quit the pager, then redisplay the message.)  Headers with short
 lines are passed un-mangled.

 This behaviour is somewhat new - Mutt 1.5.13 (2006-08-11) did not do this.
 (Ubuntu 7.04 did not do this; Ubuntu 8.04 does.)

 Both 1.5.18 and the latest Mercurial snapshot mangle.

 The problem is either in mutt_copy_hdr(), which chooses the terminal
 width as the wrap value, or in mutt_write_one_header(), which uses that
 terminal width instead of the value given in $wrap.  Whoever broke this
 is in a better position to know how to fix it than I am.

-- 
Ticket URL: <http://dev.mutt.org/trac/ticket/3135>
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