Re: [andreas.amann@web.de: ediff problem with longlines-show-hard-newlines]

Re: [andreas.amann@web.de: ediff problem with longlines-show-hard-newlines]

[Michael Kifer]

> Date: Thu, 5 Jul 2007 15:14:16 +0100
> From: Andreas Amann <andreas.amann@web.de>
> To: bug-gnu-emacs@gnu.org
> Subject: ediff problem with longlines-show-hard-newlines
> 
> 
> entering ediff-buffers and leaving it immediately sets the modified
> flags of the visited buffers, even if no editing was done. This only
> happens if longlines-show-hard-newlines is set to true.
> 
> 
> Minimal test case:
> >cat ~/.emacs
> (require 'longlines)
> (add-hook 'text-mode-hook (lambda () (longlines-mode 1)))
> (setq longlines-show-hard-newlines t)
> 
> >cat testcase_ediff.txt
> A C
> 
> >cat testcase_ediff2.txt
> A B C
> 
> >emacs -no-site-file testcase_ediff.txt testcase_ediff2.txt
> "M-x ediff-buffers" and select the two loaded buffers
> "q" to quit ediff ("yes" to confirm)
> 
> now the modified flags "**" are set for both buffers although no
> editing was done.  

This is because with your settings:

    (require 'longlines)
    (add-hook 'text-mode-hook (lambda () (longlines-mode 1)))
    (setq longlines-show-hard-newlines t)

executing (longlines-mode 0) marks text buffers as modified.

It seems to me a problem with longlines-mode rather than with ediff.

I am copying this to the maintainer of longlines.el for clarifications.