commit https://github.com/vim/vim/commit/41e0f2f48f541eb2c8eb5620d3f1d270eb979154 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 8 14:44:42 2016 +0100 patch 7.4.1513 Problem: "J" fails if there are not enough lines. (Christian Neukirchen) Solution: Reduce the count, only fail on the last line.

" 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