patch 8.0.0372: more options are not always defined commit https://github.com/vim/vim/commit/a713ff819d134dc34e507c05273c935bfc17e795 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Feb 25 22:18:43 2017 +0100 patch 8.0.0372: more options are not always defined Problem: More options are not always defined. Solution: Consistently define all possible options.

" 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