GNU bug report logs - #7033
23.2; M-n in diff mode causes unwanted face changes

Previous Next

Full log

Message #8 received at 7033 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Martin Jambor <mjambor <at> suse.cz>
Cc: 7033 <at> debbugs.gnu.org
Subject: Re: bug#7033: 23.2; M-n in diff mode causes unwanted face changes
Date: Tue, 14 Sep 2010 23:15:30 +0200

> When I open almost any patch in the diff mode and press M-n to get to
> the next hunk, random portions of the text (just parts of a line) change
> their face from diff-added or diff-removed to diff-refine change.  This
> causes the text to be displayed in a wrong background, causing it to be
> rather difficult to read (and is always unpleasant).  I have not
> observed any pattern as to what text is changed but it is always exactly
> the same text in the given file.

> This does not happen with emacs 22, only with 23, I have observeed it on
> Suse and Debian linux distributions.  I can reproduce the bug when I run
> emacs with the -Q switch like e.g.

It's not a bug, it's a feature (the diff-refine face is used to
highlight the parts of a hunk that are changed, at a finer granularity
than just lines).  So when the hunk looks like:

   -foo bar baz
   +foo toto bar baz

the "toto" word will be highlighted.  When diffing refilled LaTeX
paragraphs where a few words were added/removed, I find it to be invaluable.

C-h f diff-auto-refine-mode RET
C-h f diff-refine-hunk RET


        Stefan

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.