From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: removing white space highlight Date: Sun, 21 Feb 2016 02:48:47 +0100 Message-ID: <87egc6ltog.fsf@debian.uxu> References: <20160220120357638044819@bob.proulx.com> <87vb5ilx7p.fsf@debian.uxu> <20160220183203963873857@bob.proulx.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1456019357 6519 80.91.229.3 (21 Feb 2016 01:49:17 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 21 Feb 2016 01:49:17 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Feb 21 02:49:10 2016 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aXJ94-00011D-8W for geh-help-gnu-emacs@m.gmane.org; Sun, 21 Feb 2016 02:49:10 +0100 Original-Received: from localhost ([::1]:37060 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aXJ93-0000yI-GC for geh-help-gnu-emacs@m.gmane.org; Sat, 20 Feb 2016 20:49:09 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40089) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aXJ8t-0000y9-3h for help-gnu-emacs@gnu.org; Sat, 20 Feb 2016 20:49:00 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aXJ8p-0000HR-Tc for help-gnu-emacs@gnu.org; Sat, 20 Feb 2016 20:48:59 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:37424) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aXJ8p-0000HK-Nf for help-gnu-emacs@gnu.org; Sat, 20 Feb 2016 20:48:55 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aXJ8o-0000p7-M4 for help-gnu-emacs@gnu.org; Sun, 21 Feb 2016 02:48:54 +0100 Original-Received: from nl106-137-54.student.uu.se ([130.243.137.54]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 21 Feb 2016 02:48:54 +0100 Original-Received: from embe8573 by nl106-137-54.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 21 Feb 2016 02:48:54 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 74 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-54.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) Cancel-Lock: sha1:10ZcqY51r1NltlrF5Uq9jegq/2Y= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:109234 Archived-At: Bob Proulx writes: >> Of course, there shouldn't be any superfluous >> whitespace trailing individual text lines *or* the >> file contents itself. >> >> Here one way to do it ... > > That is one way to do it. However I don't think it > is a good idea to do this automatically every time. > I would rather see that it needs to be done and the > do it intentionally. Why? > Usually I will do one whitespace only cleanup with > no other changes and do it first. That way diff -b > or -w or -B or other combination will show as clean > with no non-whitespace changes. If there is nothing to do, `delete-trailing-whitespace', doesn't do anything. Also, I have RET `newline-and-indent'. I never thought about it, but what it does is it removes extra blanks and breaks the line after the last char instead. This is also something I can recommend for `C-k': (defun kill-line-remove-blanks () (interactive) (if (looking-at "[[:space:]]*$") (let ((end (point-max))) (delete-blank-lines) (when (= end (point-max)) (delete-horizontal-space) (delete-char 1)) (when (and (= (point-min) (point)) (looking-at "[[:space:]\n]") ) (kill-line) )) (kill-line) )) It works like this - if we let that the char for full stop (or "period", i.e. "." ) represent point position: Text line which isn't empty 1... . Text line which isn't empty 2... Here, the result of invoking the command will be Text line which isn't empty 1... Text line which isn't empty 2... But here - Text line which isn't empty 1... . (add arbitrarily blank lines here) Text line which isn't empty 2... - the result will be: Text line which isn't empty 1... . Text line which isn't empty 2... Interesting! -- underground experts united http://user.it.uu.se/~embe8573