commit https://github.com/vim/vim/commit/1d478a6242871dcf4566814d3c6208df17991426 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Sep 29 14:01:12 2015 +0200 patch 7.4.886 Problem: Windows7: Switching screen buffer causes flicker when using system(). Solution: Instead of actually switching screen buffer, duplicate the handle. (Yasuhiro Matsumoto)

README_src.txt for version 7.4 of Vim: Vi IMproved.

The source archive contains the files needed to compile Vim on Unix systems.
It is packed for Unix systems (NL line separator).

For more information, see the README.txt file that comes with the runtime
archive (vim-7.4-rt.tar.gz).  To be able to run Vim you MUST get the runtime
archive too!