From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#5312: Why is =?utf-8?q?=E2=80=98show-trailing-whitespace?= =?utf-8?b?4oCZ?= considered unsafe? Date: Wed, 06 Jan 2010 15:25:27 -0500 Message-ID: References: <87vdfiqake.fsf@gnu.org> <87hbqz3a8h.fsf@gnu.org> Reply-To: Stefan Monnier , 5312@debbugs.gnu.org NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1262811245 1382 80.91.229.12 (6 Jan 2010 20:54:05 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 6 Jan 2010 20:54:05 +0000 (UTC) Cc: 5312@debbugs.gnu.org To: James Cloos Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jan 06 21:53:57 2010 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1NSctA-0001Qp-NM for geb-bug-gnu-emacs@m.gmane.org; Wed, 06 Jan 2010 21:53:57 +0100 Original-Received: from localhost ([127.0.0.1]:58327 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NSctB-0005Eb-0T for geb-bug-gnu-emacs@m.gmane.org; Wed, 06 Jan 2010 15:53:57 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NScoI-0002e1-NO for bug-gnu-emacs@gnu.org; Wed, 06 Jan 2010 15:48:54 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NScoE-0002bz-3m for bug-gnu-emacs@gnu.org; Wed, 06 Jan 2010 15:48:54 -0500 Original-Received: from [199.232.76.173] (port=36135 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NScoD-0002bv-TT for bug-gnu-emacs@gnu.org; Wed, 06 Jan 2010 15:48:49 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:56097) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1NScoD-0001VG-Ha for bug-gnu-emacs@gnu.org; Wed, 06 Jan 2010 15:48:49 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1NScSA-0005Dc-HU; Wed, 06 Jan 2010 15:26:02 -0500 X-Loop: bug-gnu-emacs@gnu.org Mail-Followup-To: Stefan Monnier , 5312@debbugs.gnu.org Resent-From: Stefan Monnier Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 06 Jan 2010 20:26:02 +0000 Resent-Message-ID: Resent-Sender: bug-gnu-emacs@gnu.org X-Emacs-PR-Message: followup 5312 X-Emacs-PR-Package: emacs X-Emacs-PR-Keywords: Original-Received: via spool by 5312-submit@debbugs.gnu.org id=B5312.126280953620052 (code B ref 5312); Wed, 06 Jan 2010 20:26:02 +0000 Original-Received: (at 5312) by debbugs.gnu.org; 6 Jan 2010 20:25:36 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NScRj-0005DN-LI for submit@debbugs.gnu.org; Wed, 06 Jan 2010 15:25:35 -0500 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NScRh-0005DG-Ok for 5312@debbugs.gnu.org; Wed, 06 Jan 2010 15:25:34 -0500 Original-Received: from faina.iro.umontreal.ca (faina.iro.umontreal.ca [132.204.26.177]) by pruche.dit.umontreal.ca (8.14.1/8.14.1) with ESMTP id o06KPRWh002449; Wed, 6 Jan 2010 15:25:27 -0500 Original-Received: by faina.iro.umontreal.ca (Postfix, from userid 20848) id 721A03A317; Wed, 6 Jan 2010 15:25:27 -0500 (EST) In-Reply-To: (James Cloos's message of "Wed, 06 Jan 2010 14:33:00 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.91 (gnu/linux) X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 1 Rules triggered RV3442=0 X-Spam-Score: -1.4 (-) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list X-Spam-Score: -1.4 (-) Resent-Date: Wed, 06 Jan 2010 15:26:02 -0500 X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:34009 Archived-At: Stefan> Of course, maybe you can come up with file formats where trailing Stefan> whitespaces are seriously problematic as well. I just can't think Stefan> of any off the top of my head. > One seen recently -- on the groff list, IIRC -- involved continuation > lines. <\> works, <\> does not. That also affects C, C++, Elisp, and many other formats. The fact that we haven't mentioned them indicates that it's not considered "seriously problematic" enough. Actually, font-lock can also be used in those modes to highlight such suspicious forms: it's more useful than show-trailing-whitespace since it can more specifically target those trailing whitespaces that are semantically significant. Stefan