From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master c66aaa6: Recomplexify =?utf-8?Q?=E2=80=98delete-trailing-whitespace=E2=80=99?= by treating \n as whitespace again Date: Wed, 15 Mar 2017 07:28:26 -0400 Message-ID: References: <20170315023157.29463.36647@vcs0.savannah.gnu.org> <20170315023159.30AA520CAB@vcs0.savannah.gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1489577360 4596 195.159.176.226 (15 Mar 2017 11:29:20 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 15 Mar 2017 11:29:20 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) Cc: Noam Postavsky To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Mar 15 12:29:13 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1co774-0007vb-CR for ged-emacs-devel@m.gmane.org; Wed, 15 Mar 2017 12:29:06 +0100 Original-Received: from localhost ([::1]:36222 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1co777-0002Sa-8a for ged-emacs-devel@m.gmane.org; Wed, 15 Mar 2017 07:29:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:59758) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1co76Y-0002SV-KC for emacs-devel@gnu.org; Wed, 15 Mar 2017 07:28:35 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1co76T-00024M-K7 for emacs-devel@gnu.org; Wed, 15 Mar 2017 07:28:34 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.181]:58388) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1co76T-00023v-EA for emacs-devel@gnu.org; Wed, 15 Mar 2017 07:28:29 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D3CQD2I8lY/9TkSC1dHAEBBAEBCgEBg1GFS4sAkGMpAZcghhwEAgKCZkQUAQIBAQEBAQEBayiFFgEEASMzIwULCxoCGAcHAgIUGA2KLwitZIImimABAQgogQuKMoRUTII6gl8BBJxDlB6IYIZijyWEIjYhgQQjFggshU6BZiSJZwEBAQ X-IPAS-Result: A0D3CQD2I8lY/9TkSC1dHAEBBAEBCgEBg1GFS4sAkGMpAZcghhwEAgKCZkQUAQIBAQEBAQEBayiFFgEEASMzIwULCxoCGAcHAgIUGA2KLwitZIImimABAQgogQuKMoRUTII6gl8BBJxDlB6IYIZijyWEIjYhgQQjFggshU6BZiSJZwEBAQ X-IronPort-AV: E=Sophos;i="5.36,168,1486443600"; d="scan'208";a="295345531" Original-Received: from 45-72-228-212.cpe.teksavvy.com (HELO ceviche.home) ([45.72.228.212]) by smtp.teksavvy.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 15 Mar 2017 07:28:26 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id 74DD2661A5; Wed, 15 Mar 2017 07:28:26 -0400 (EDT) In-Reply-To: <20170315023159.30AA520CAB@vcs0.savannah.gnu.org> (Noam Postavsky's message of "Tue, 14 Mar 2017 22:31:58 -0400 (EDT)") X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 206.248.154.181 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:213032 Archived-At: > Recomplexify =E2=80=98delete-trailing-whitespace=E2=80=99 by treating= \n as > whitespace again > > Mostly reverts "Simplify =E2=80=98delete-trailing-whitespace=E2=80=99= by not treating > \n as whitespace" from 2016-07-04. Setting \n to non-whitespace > causes the regex engine to backtrack a lot when searching for > "\\s-+$" (Bug#26079). Why do we use syntax-tables? IOW why do we use \s- rather than something like [\s\t]? Stefan