linux-kernel - Re: [PATCH] CodingStyle: Add information about trailing whitespace.

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Message-ID: <a8e1da0706280020ocf81ce7u98de87f16d674706@mail.gmail.com>
Date:	Thu, 28 Jun 2007 07:20:24 +0000
From:	"Dave Young" <hidave.darkstar@...il.com>
To:	"Li Yang-r58472" <LeoLi@...escale.com>
Cc:	"Josh Triplett" <josh@...nel.org>,
	"Jan Engelhardt" <jengelh@...putergmbh.de>,
	"Chris Shoemaker" <c.shoemaker@....net>,
	"Josh Triplett" <josht@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH] CodingStyle: Add information about trailing whitespace.

>On 6/28/07, Dave Young <hidave.darkstar@...il.com> wrote:
> >On 6/28/07, Li Yang-r58472 <LeoLi@...escale.com> wrote:
> > > -----Original Message-----
> > > From: linux-kernel-owner@...r.kernel.org
> > > [mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of Josh Triplett
> > > Sent: Thursday, June 28, 2007 2:59 PM
> > > To: Jan Engelhardt
> > > Cc: dave young; Chris Shoemaker; Josh Triplett;
> > linux-kernel@...r.kernel.org;
> > > akpm@...ux-foundation.org
> > > Subject: Re: [PATCH] CodingStyle: Add information about trailing
> > whitespace.
> > >
> > > Jan Engelhardt wrote:
> > > > On Jun 28 2007 06:29, dave young wrote:
> > > >> IMHO, another  cause of trailing whitespace is human error, for
> > > >> example long lines breaking will easy to cause the first line with
> > one
> > > >> traling whitespace (original space between the last two words).
> > > >
> > > > Most common errors (to me) are:
> > > >
> > > >  - hit return+tab too quickly that it interchanges, hence producing
> > > >    the unwanted \t\n
> > > >  - hit return+return to start a new paragraph of code;
> > > >    the intermediate line remains indented if autoindent is on.
> > >
> > > Interestingly, emacs gets that case right: when you hit enter it
> > places the
> > > cursor at the properly indented insertion point, but if you leave the
> > line
> > > without typing anything it does not leave the indentation.  I thought
> > I
> > > remembered vim doing the same thing, but I just tested and it appears
> > not.  It
> > > seems to avoid leaving subsequent lines indented, but not the first
> > one.
> >
> > No, vim works just fine here without leaving any indentation.  Maybe the
> > version of vim or the options matter.
> >
> Yes, vim autoindent doesn't leave tabs in blank line for me.
>
And for vim trailing space, there's a tip in vim.org:
http://www.vim.org/tips/tip.php?tip_id=878
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