From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758461AbYDNCdU (ORCPT ); Sun, 13 Apr 2008 22:33:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753302AbYDNCdK (ORCPT ); Sun, 13 Apr 2008 22:33:10 -0400 Received: from fg-out-1718.google.com ([72.14.220.159]:40301 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752875AbYDNCdJ (ORCPT ); Sun, 13 Apr 2008 22:33:09 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:organization:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=WBbQdQlCw11yvSDngPlOuRQun+e2QSOzGqDhtitWvXptLE0DxD1Z87ShUKitOwPxTtvHTHgOiFry4FLtd1kmcURi1yiKhTCZCSMcy7hRA+wQ803a8Z408oVSPqhbnJy4EGgv+b6WAqbS9MPeNF6uzy0iamNolhv3mwIu6EwQ9tY= Message-ID: <4802C265.8060802@gmail.com> Date: Mon, 14 Apr 2008 06:33:09 +0400 From: Dmitri Vorobiev Organization: DmVo Home User-Agent: Thunderbird 1.5.0.14ubu (X11/20080306) MIME-Version: 1.0 To: Randy Dunlap CC: Al Viro , akpm@linux-foundation.org, corbet@lwn.net, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/1] Fix typos in Documentation/filesystems/seq_file.txt References: <1208111201-15698-1-git-send-email-dmitri.vorobiev@gmail.com> <20080413151020.bfa62f58.randy.dunlap@oracle.com> <48028841.900@gmail.com> <20080413224547.GS9785@ZenIV.linux.org.uk> <20080413190916.57cede66.randy.dunlap@oracle.com> In-Reply-To: <20080413190916.57cede66.randy.dunlap@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Randy Dunlap пишет: > On Sun, 13 Apr 2008 23:45:47 +0100 Al Viro wrote: > >> On Mon, Apr 14, 2008 at 02:25:05AM +0400, Dmitri Vorobiev wrote: >> >>> Actually, I was doubting whether the "2 spaces" thing was >>> intentional or not. The overwhelming majority of the sentences in >>> this document use only one space after a period, however, and this >>> made me decide that the "2 spaces" thing had not been deliberate >>> but just a typo. >>> >>> Are there any rules about using spaces after a period at the end >>> of a sentence? >> See Knuth (TeXbook) for the story on that... > > I googled that but I don't see the history there. > > AFAIK, 2 spaces at the end of sentences is a typewriter-ism, for easier > visual separation of sentences. > Probably (just guessing here) has to do with monospace fonts vs. > (not having) proportional ones there (usually). The following Wikipedia article is the most complete and exhaustive source I could find while researching the double spacing rules: http://en.wikipedia.org/wiki/French_spacing To put it briefly, there are three main conventions about inter-sentence spacing: o English spacing a.k.a. American typewriter spacing: two spaces after full stop; o French spacing, i.e. one space; o traditional typography, which uses proportional fonts and is therefore not very much interesting here. Offhand, it seems that the double spacing convention is being currently used in a more or less consistent manner throughout Linux docs. It also seems to me that this can be made a requirement and documented somewhere. Thanks, Dmitri > > --- > ~Randy > [Yes, I learned to type on a manual typewriter.] >