From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Stephen J. Turnbull" Newsgroups: gmane.emacs.devel Subject: Re: shouldn't `delete-blank-lines' treat form-feed as whitespace? Date: Sun, 07 Mar 2010 14:08:21 +0900 Message-ID: <87ocj0u3ay.fsf@uwakimon.sk.tsukuba.ac.jp> References: <201003061734.27587.jyavner@rogers.com> <83wrxo3gzj.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: dough.gmane.org 1267961232 20943 80.91.229.12 (7 Mar 2010 11:27:12 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 7 Mar 2010 11:27:12 +0000 (UTC) Cc: Jonathan Yavner , juri@jurta.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Mar 07 05:58:05 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1No8Z2-0000Xj-Kh for ged-emacs-devel@m.gmane.org; Sun, 07 Mar 2010 05:58:04 +0100 Original-Received: from localhost ([127.0.0.1]:47079 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1No8Z1-0005ma-MC for ged-emacs-devel@m.gmane.org; Sat, 06 Mar 2010 23:58:03 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1No8Yx-0005mV-CG for emacs-devel@gnu.org; Sat, 06 Mar 2010 23:57:59 -0500 Original-Received: from [140.186.70.92] (port=54666 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1No8Yv-0005mN-LV for emacs-devel@gnu.org; Sat, 06 Mar 2010 23:57:58 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1No8Yv-0002cj-6o for emacs-devel@gnu.org; Sat, 06 Mar 2010 23:57:57 -0500 Original-Received: from mtps02.sk.tsukuba.ac.jp ([130.158.97.224]:45729) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1No8Ys-0002c9-It; Sat, 06 Mar 2010 23:57:55 -0500 Original-Received: from uwakimon.sk.tsukuba.ac.jp (uwakimon.sk.tsukuba.ac.jp [130.158.99.156]) by mtps02.sk.tsukuba.ac.jp (Postfix) with ESMTP id 1AE1C820D; Sun, 7 Mar 2010 13:57:50 +0900 (JST) Original-Received: by uwakimon.sk.tsukuba.ac.jp (Postfix, from userid 1000) id 902DE1A382A; Sun, 7 Mar 2010 14:08:21 +0900 (JST) In-Reply-To: <83wrxo3gzj.fsf@gnu.org> X-Mailer: VM 8.0.12-devo-585 under 21.5 (beta29) "garbanzo" a03421eb562b XEmacs Lucid (x86_64-unknown-linux) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:121681 Archived-At: Eli Zaretskii writes: > How is the line-breaking property relevant to this function? The doc > string says just "delete all surrounding blank lines". It doesn't > mention line-breaking at all. The question is, should a line > consisting only of NBSP characters be considered a blank line. My understanding of the Unicode standard is that whitespace characters are blanks. Interestingly enough, however, in many cases they are treated as non-blank characters that happen to be extremely conservative of ink. :-) Eg, one oftens see the " " idiom in HTML (especially in TD elements). Nevertheless, I think NBSP ought to be treated as a blank for the purpose of `delete-blank-lines'.