commit https://github.com/vim/vim/commit/d563883a1fb5ec6cf4a2758c5e36ac1ff4e9bb3d Author: Bram Moolenaar <Bram@vim.org> Date: Fri Sep 9 17:59:50 2016 +0200 patch 7.4.2354 Problem: The example that explains nested backreferences does not work properly with the new regexp engine. (Harm te Hennepe) Solution: Also save the end position when adding a state. (closes https://github.com/vim/vim/issues/990)

let encoding = &enc
if encoding == ''
	let encoding = 'utf-8'
endif

if encoding == 'utf-8'
	source <sfile>:p:h/persian-iranian_utf-8.vim
endif