bug#20322: 25.0.50; indent-tabs-mode should default to nil

[Eli Zaretskii]

> Date: Wed, 22 Apr 2015 18:23:06 +0300
> From: Dmitry Gutov <dgutov@yandex.ru>
> CC: 20322@debbugs.gnu.org
> 
> On 04/22/2015 06:18 PM, Eli Zaretskii wrote:
> 
> > I meant the actual usage of tabs/spaces in the files.  That, of
> > course, doesn't change when the project migrates.
> 
> I don't see how this contradicts my previous message.

I thought it was obvious: Changing the whitespace usage is not a
simple job, and no one will normally do that.  So having different
defaults will silently and subtly cause a change in project-wide
conventions, something that I think is undesirable.

There are also mixed C/C++ projects, where different defaults will
cause similar problems.

In short, these two languages are just too similar and inter-related
to justify using the same defaults in this regard.