commit https://github.com/vim/vim/commit/16b3578f355282846f2600ce77fb344950f0b9ce Author: Bram Moolenaar <Bram@vim.org> Date: Fri Sep 9 20:29:50 2016 +0200 patch 7.4.2355 Problem: Regexp fails to match when using "\>\)\?". (Ramel) Solution: When a state is already in the list, but addstate_here() is used and the existing state comes later, add the new state anyway.

$! test77a - help file creating checksum on VMS
$! Created by Zoltan Arpadffy
$
$ IF P1 .NES. ""
$ THEN
$    checksum 'P1'
$    show symb CHECKSUM$CHECKSUM
$ ENDIF