commit https://github.com/vim/vim/commit/119d4693e06e68d4f099aa7287e375ae3d265fd0 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 5 21:21:24 2016 +0100 patch 7.4.1494 Problem: clr_history() does not work properly. Solution: Increment hisptr. Add a test. (Yegappan Lakshmanan)

" 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