Deprecate tabs for indenting (was Re: Indenting with tabs vs spaces)

[Lee Harr]

>     You'll not find tabs in any code that I touch.  Literally.  I've got my
> editor configured to save spaces, not tabs.
> 

Same here.

I am just wondering that if letting people actually use tabs
is causing trouble, why not get rid of that "feature".

Seems much less controversial than *cough* integer arithmetic *cough*
anyhow...