> On May 6, 2017, at 20:02, Jean-Christophe Helary <jean.christophe.helary@gmail.com> wrote:
> 
> Ok, I'm fine with that. Apologies for my lack of understanding of the issues.
> 
> Jean-Christophe
> 
>> On May 6, 2017, at 19:43, Eli Zaretskii <eliz@gnu.org> wrote:
>> 
>>> From: Jean-Christophe Helary <jean.christophe.helary@gmail.com>
>>> Date: Sat, 6 May 2017 19:33:10 +0900
>>> Cc: tino.calancha@gmail.com,
>>> mvoteiza@udel.edu,
>>> emacs-devel@gnu.org
>>> 
>>> My original idea was to put the regexp into a variable that *can* eventually be overridden by a user preference.
>> 
>> Does this really have legitimate use cases?  We are talking about a
>> very low-level function; overriding its default definition of
>> whitespace by a user option would affect every single use of this
>> function, and will most probably disrupt some code which uses it.
>> 
>> I think having a way for overriding the default programmatically
>> should be good enough, at least for now.  Let's not provide a
>> defcustom unless and until we have use cases for that which we want to
>> support.
>