BUG #14415: non-breaking space matching in regex as whitespace

The following bug has been logged on the website:

Bug reference: 14415
Logged by: Valery Guskov
Email address: valerijs(dot)gusjkovs(at)gmail(dot)com
PostgreSQL version: 9.6.0
Operating system: RedHat
Description:

This was workng on 9.4 at least, but does not in 9.6. Followind returns
should be reversed as non-breaking space is whitespace:

select 'Web project experience' ~* 'Web\S+' as pew;
pew
-----
t
(1 row)

_______________________________________________

select 'Web project experience' ~* 'Web\s+' as pew;
pew
-----
f
(1 row)