From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Hongyi Zhao Newsgroups: gmane.emacs.help Subject: Re: The `^L' appeared in built-in help. Date: Tue, 6 Jul 2021 11:44:43 +0800 Message-ID: References: <87mtr0889q.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31467"; mail-complaints-to="usenet@ciao.gmane.io" To: Emanuel Berg , help-gnu-emacs Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Jul 06 05:45:27 2021 Return-path: Envelope-to: geh-help-gnu-emacs@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 1m0c1W-00080D-2U for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 06 Jul 2021 05:45:26 +0200 Original-Received: from localhost ([::1]:44232 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0c1U-0002Mo-Ub for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 23:45:24 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41288) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0c13-0002MR-S2 for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 23:44:57 -0400 Original-Received: from mail-yb1-xb35.google.com ([2607:f8b0:4864:20::b35]:45946) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m0c12-0004lf-3N for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 23:44:57 -0400 Original-Received: by mail-yb1-xb35.google.com with SMTP id k184so32106663ybf.12 for ; Mon, 05 Jul 2021 20:44:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=ulmHV+vMxf7mnJ0IIkugEaHZ3jqfML0AvsAsyLaCshg=; b=j66rQRpWtyXMMqO8JKYRgzgU+/IbxgyVOEOYrlaWjbG4shOOy4Rir8l1SBsNAqSVTb 8M5fPlR702+0xRHn3gLgJQIFYEssAn1kjQ1HE/PM7tCt9g0xN2/eeiOZqZW+G6dwApPe i2Zn1CKH5xjaey7CGG7L141Ojgvuc/P2YXHP94+O3rYGs9O34sjkq8SJmAopSZ4ELNhJ OP+PCI/WmqnL8e14P1q9KK2MXsAefh/Ji8m742fma0RsiWdlR3mW5l2bPTzOVFdTuzpb mWlD9DM6Tg45rAR0ltc500XM0G1+UbXE7kCXHb2DMfOaT1BddhTRPnC/Jqka+pjpwUMy tKtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=ulmHV+vMxf7mnJ0IIkugEaHZ3jqfML0AvsAsyLaCshg=; b=c/7Dr4CwvNlVdgxsu7bIQ9UAC/QWxnB+gVaAJP9YZaLzrpDDZpwf/WPqAsU9AIzH0Y F2u+hmuVzeE/3PmAvYqUgZdbB5Hvpe9c2aXrZtXnAf3fZx1ygqKk06u6XjOo1ixdX92s iYQAQcpOsyiptgHDE6ZzfK36Bpoh6QyBExN4kSAPLE32x3LumzreD8566Orrq9TV8fZL 9X9Exh37UD6sKWE4ucuLTfSq25tR3isXZar+NPwn/B4BfsqLnQoa3ogmJAYwnaqWe6nw SUddKoZ/dIvS5+WyQ8CRAHferY4Yx+D5aaxd4VwMWoShC4Lx86Lnvc13x6NGOfPZCquG XpnQ== X-Gm-Message-State: AOAM531Xp3X+Y0VKHnNo+yds5st3UY0kUD1Qj+q6ff+3EOPcUerKfdLX YbFocV4W13YXruwbc0SoBzBsi5ATDNuw8y9f0Jc= X-Google-Smtp-Source: ABdhPJy/DpOWkOGHM9oNkAdAfS50TwBnOshV9UecKc5o8OH8tA+yR+Ul9j++cxakAgKYBiC6r/lGcZejb0XKagLBca8= X-Received: by 2002:a25:2d57:: with SMTP id s23mr22375063ybe.373.1625543095128; Mon, 05 Jul 2021 20:44:55 -0700 (PDT) In-Reply-To: <87mtr0889q.fsf@zoho.eu> Received-SPF: pass client-ip=2607:f8b0:4864:20::b35; envelope-from=hongyi.zhao@gmail.com; helo=mail-yb1-xb35.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:131537 Archived-At: On Tue, Jul 6, 2021 at 10:55 AM Emanuel Berg via Users list for the GNU Emacs text editor wrote: > > Hongyi Zhao wrote: > > > I noticed so many `^L' appeared in Emacs' built-in help. > > According to the ascii document shown below, this should > > mean '\f' (form feed): > > > > $ man ascii | grep ' L$' > > 014 12 0C FF '\f' (form feed) 114 76 4C L > > > > But I also noticed that this control character is not used > > evenly throughout the document. > > > > Any hints for this phenomenon? > > This was discussed here not long ago! See if you can grep the > archives! [1] > > They are used to delimit > > > > pages! > > M-x insert-char RET FORM FEED (FF) RET > But `M-x describe-char RET' for `^L' in scratch buffer shows the following: to input: type "C-x 8 RET c" or "C-x 8 RET FORM FEED (FF)" And the above-mentioned two type input sequences will generated different characters: "C-x 8 RET c" ---> `^F' "C-x 8 RET FORM FEED (FF)" ---> `^L' > [1] http://lists.gnu.org/archive/html/help-gnu-emacs/ Are there some built-in Emacs commands for searching this mail archive conveniently? Regards -- Assoc. Prof. Hongyi Zhao Theory and Simulation of Materials Hebei Vocational University of Technology and Engineering NO. 552 North Gangtie Road, Xingtai, China