From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Patch for emacs/basic.texi Date: Wed, 16 Sep 2020 09:40:26 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="19667"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Richard Stallman Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Sep 16 15:41:46 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kIXgw-00053c-GH for ged-emacs-devel@m.gmane-mx.org; Wed, 16 Sep 2020 15:41:46 +0200 Original-Received: from localhost ([::1]:38256 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kIXgv-0007OM-He for ged-emacs-devel@m.gmane-mx.org; Wed, 16 Sep 2020 09:41:45 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56958) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kIXfp-0006md-Nv for emacs-devel@gnu.org; Wed, 16 Sep 2020 09:40:40 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:10156) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kIXfl-0006wF-SA; Wed, 16 Sep 2020 09:40:36 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id E561B100234; Wed, 16 Sep 2020 09:40:30 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id EA87210025D; Wed, 16 Sep 2020 09:40:28 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1600263628; bh=NN7sQnBd0NKFMknajgWpCKOI1i1PCSeNSW1BE2ozgCE=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=PQ6q2p5oLdjMFaY5W170CHprybIbE2OKTbGpv8ZZt/id1rIDhWGEXMH1ggfEWN84Y INjb0bvT08iswXIs/LClIubQ6azqUIYKq1aXI3W9TaUPrhHn3yYTPgt+OyAUJEOqWf Rucw/9Zxvvx8xSIr7NNYEdmncUJH8WKdn43laxWzbgWs4txAnO2YpMpKgcwh5mRRHk HW5418wzYxB9BmUxEyrHey0LNlX+HiXxM/pM8vFy3zilUAXiWoacZdQtgAf34XLS9a talOuFNh8wcrn16sXyUrNfUZR8m0Ws4K8yVFSARVo7YSUYIq5P++P3ihxNj0sVS2M2 30dFIzJfzT+VQ== Original-Received: from alfajor (unknown [45.72.232.131]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id BB7281202C5; Wed, 16 Sep 2020 09:40:28 -0400 (EDT) In-Reply-To: (Richard Stallman's message of "Wed, 16 Sep 2020 01:05:54 -0400") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/16 09:29:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:255871 Archived-At: > + On a graphics terminal, the easiest way to invoke @code{undo} is > +with @kbd{C-/}; that doesn't need the shift key. This is true for the US keyboard layout but is not true in general, so it should be appropriately qualified. > On a text terminal, +@kbd{C-/} does not exist, but usually you can > type @kbd{C-_} without +the shift key and it will work anyway. Similarly, I can imagine some terminals where C-/ works, as well as keyboards where "_" doesn't require a shift key, or terminals where "C-_ without the shift key" won't send a byte-sequence that ends up bound to `undo`. E.g. I just tried `C-h k C--` in a "plain old xterm" here with a US keyboard and Emacs told me: C-- (translated from M-[ 2 7 ; 5 ; 4 5 ~) runs the command negative-argument (found in global-map), which is an interactive compiled Lisp function in =E2=80=98simple.el=E2=80=99. [...] OTOH, `C-h k C-/` in this same terminal gave me: \^_ runs the command undo (found in global-map), which is an interactive compiled Lisp function in =E2=80=98simple.el=E2=80=99. [...] Could it be that you misremembered what was the "trick" behind having both `C-/` and `C-_` keybindings (it's not `C--` but `C-/` that gets mapped to C-_)? Stefan