From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Change of Lisp syntax for "fancy" quotes in Emacs 27? Date: Sat, 6 Oct 2018 11:03:25 -0700 Organization: UCLA Computer Science Department Message-ID: <5fcbc157-51ac-0814-e470-6e76f76611ac@cs.ucla.edu> References: <83y3bc2378.fsf@gnu.org> <83k1mv1j1b.fsf@gnu.org> <5ebde087-561e-c71a-0840-d99626c02dcf@cs.ucla.edu> <83bm8710ss.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1538848945 24139 195.159.176.226 (6 Oct 2018 18:02:25 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 6 Oct 2018 18:02:25 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 Cc: npostavs@users.sourceforge.net, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Oct 06 20:02:21 2018 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 1g8quC-0006AC-DZ for ged-emacs-devel@m.gmane.org; Sat, 06 Oct 2018 20:02:20 +0200 Original-Received: from localhost ([::1]:40015 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8qwI-00022T-R2 for ged-emacs-devel@m.gmane.org; Sat, 06 Oct 2018 14:04:30 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54052) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8qve-00022N-HJ for emacs-devel@gnu.org; Sat, 06 Oct 2018 14:03:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g8qvZ-0003ed-IV for emacs-devel@gnu.org; Sat, 06 Oct 2018 14:03:50 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:59858) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1g8qvI-0003Qa-8J; Sat, 06 Oct 2018 14:03:29 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 54B0F1616D5; Sat, 6 Oct 2018 11:03:26 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id u9Wjoa3Pe6Mr; Sat, 6 Oct 2018 11:03:25 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 9347A1616EF; Sat, 6 Oct 2018 11:03:25 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 2FkskPgloa6P; Sat, 6 Oct 2018 11:03:25 -0700 (PDT) Original-Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 653C31616D5; Sat, 6 Oct 2018 11:03:25 -0700 (PDT) In-Reply-To: <83bm8710ss.fsf@gnu.org> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 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:230265 Archived-At: Eli Zaretskii wrote: > these examples are not relevant to the issue at hand, > which is only about quotes Quotes are part of the same problem. For example, here's some code in Gnu= s: (ignore-errors (gnus-get-function method 'open-server)) Change that APOSTROPHE (U+0027) to RIGHT SINGLE QUOTATION MARK (U+2019) a= nd the=20 code will look the same but do something quite different, with no diagnos= tic.=20 This sort of code is reasonably common and can easily be security-relevan= t. If=20 Emacs stops diagnosing this abuse of confusable characters, we're opening= =20 ourselves up more to malicious code. > How will it lower the confusion, when the same is required for a space? Let me rephrase my point, with apostrophe rather than space. The point is not to distinguish =C2=B4open-server (with U+00B4 ACUTE ACCE= NT) from=20 =D5=9Aopen-server (with U+055A ARMENIAN APOSTROPHE); the point is to dist= inguish both=20 of these from the 'open-server (apostrophe followed by symbol) that a rea= der=20 would ordinarily expect here. We need to give an obvious way for human re= aders=20 to see that something odd is going on. Readers can then use C-x =3D (or w= hatever)=20 to find out exactly what the oddness is.