bug#16731: 24.3.50; Latin small letter sharp s is not considered lower-case

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: Juanma Barranquero <lekktu@gmail.com>,  16731@debbugs.gnu.org
> Date: Thu, 13 Feb 2014 13:47:33 -0500
> 
> Eli Zaretskii wrote:
> 
> > The question is whether we want [:upper:] to match titlecase letters.
> 
> What does grep do?
> (http://debbugs.gnu.org/16631 ?)

Grep (like most of other programs) uses locale-dependent tables
provided by libc, so it's not really relevant for us what it does.