patch 8.0.1172: when E734 is given option is still set commit https://github.com/vim/vim/commit/2a6a6c3014e728cd01c750b0f60484d4eaf22a8c Author: Bram Moolenaar <Bram@vim.org> Date: Mon Oct 2 19:29:48 2017 +0200 patch 8.0.1172: when E734 is given option is still set Problem: When E734 is given option is still set. Solution: Assign NULL to "s". (Christian Brabandt)

" Settings for test script execution
" Always use "COMMAND.COM", don't use the value of "$SHELL".
set shell=c:\COMMAND.COM shellquote= shellxquote= shellcmdflag=/c shellredir=>
" This is used only when the +eval feature is available.
if executable("cmd.exe")
   set shell=cmd.exe
endif

source setup.vim