commit https://github.com/vim/vim/commit/595e64e259faefb330866852e1b9f6168544572a Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 7 19:19:53 2016 +0100 patch 7.4.1279 Problem: jsonencode() is not producing strict JSON. Solution: Add jsencode() and jsdecode(). Make jsonencode() and jsondecode() strict.

" 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