patch 8.1.0050: $VIM_TERMINAL is also set when not in a terminal window commit https://github.com/vim/vim/commit/493359eb3b10377d5c3524e91d911809b8ac7a76 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Jun 12 20:25:52 2018 +0200 patch 8.1.0050: $VIM_TERMINAL is also set when not in a terminal window Problem: $VIM_TERMINAL is also set when not in a terminal window. Solution: Pass a flag to indicate whether the job runs in a terminal.

README_src.txt for version 8.1 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-8.1-rt.tar.gz).  To be able to run Vim you MUST get the runtime
archive too!