GNU bug report logs - #21766
25.0.50; delete-trailing-whitespace sometimes deletes non-whitespace

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Juanma Barranquero <lekktu <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#21766: closed (25.0.50; delete-trailing-whitespace sometimes
 deletes non-whitespace)
Date: Wed, 28 Oct 2015 17:39:01 +0000

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Your message dated Wed, 28 Oct 2015 18:38:07 +0100
with message-id <CAAeL0SR8uDKdrj16A0nm3sw+hbt3EDB9swi+vt2wKpRH66Fq0A <at> mail.gmail.com>
and subject line Re: bug#21766: 25.0.50; delete-trailing-whitespace sometimes deletes non-whitespace
has caused the debbugs.gnu.org bug report #21766,
regarding 25.0.50; delete-trailing-whitespace sometimes deletes non-whitespace
to be marked as done.

(If you believe you have received this mail in error, please contact
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21766: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21766
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Contact help-debbugs <at> gnu.org with problems

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From: Markus Triska <triska <at> metalevel.at>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50; delete-trailing-whitespace sometimes deletes non-whitespace
Date: Tue, 27 Oct 2015 00:07:10 +0100

Steps to reproduce:

1) wget http://www.metalevel.at/ei/fault1.html

2) emacs -Q fault1.html

3) M-x delete-trailing-whitespace RET

This removes several non-white-space characters, including the whole
line containing "and use it like" (line 83 in the original file),
yielding the following diff against the original file:

   http://www.metalevel.at/ei/fault1.patch

Subtle changes in different sections of the file cause different
behaviour of `delete-trailing-whitespace'. For example, if I remove the
initial paragraph (patch: http://www.metalevel.at/ei/fault12.patch) to
obtain the slightly altered file:

   http://www.metalevel.at/ei/fault2.html

Then the analogous steps, using fault2.html ($ emacs -Q fault2.html,
M-x delete-trailing-whitespace RET) work as expected, removing only
trailing whitespace characters and leading to the diff:

   http://www.metalevel.at/ei/fault2.patch

All steps work as expected in Emacs 24.5, removing only trailing
whitespace characters in all cases.

Thank you for looking into this!
Markus


In GNU Emacs 25.0.50.5 (x86_64-apple-darwin14.1.0, X toolkit, Xaw3d scroll bars)
 of 2015-10-04
Repository revision: acfb5cd0353406784f085ddb6edfb0d0587048c8
Windowing system distributor 'The X.Org Foundation', version 11.0.11502000
Configured using:
 'configure --without-ns CFLAGS=-I/opt/local/include
 LDFLAGS=-L/opt/local/lib'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG IMAGEMAGICK GSETTINGS NOTIFY ACL GNUTLS
LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS LUCID X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

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From: Juanma Barranquero <lekktu <at> gmail.com>
To: Stephen Leake <stephen_leake <at> stephe-leake.org>
Cc: Andreas Schwab <schwab <at> suse.de>, 21766-done <at> debbugs.gnu.org,
 Markus Triska <triska <at> metalevel.at>
Subject: Re: bug#21766: 25.0.50;
 delete-trailing-whitespace sometimes deletes non-whitespace
Date: Wed, 28 Oct 2015 18:38:07 +0100

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Fixed in commit 1f02cbea8b489ed7676110431aa36ad5abc47d9b
​

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