commit https://github.com/vim/vim/commit/2d35899721da0e9359a9fe1059554f8c4ea7f0c1 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 12 21:20:54 2016 +0200 patch 7.4.1925 Problem: Viminfo does not merge file marks properly. Solution: Use a timestamp. Add the :clearjumps command.

" 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