patch 8.1.1901: the +insert_expand feature is not always available Commit: https://github.com/vim/vim/commit/e2c453d38f6512ac4cff7cd26aa7780b4e2534d7 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 21 14:37:09 2019 +0200 patch 8.1.1901: the +insert_expand feature is not always available Problem: The +insert_expand feature is not always available. Solution: Graduate the +insert_expand feature.

" Settings for test script execution
" Always use "sh", don't use the value of "$SHELL".
set shell=sh

" Only when the +eval feature is present. 
if 1
  " While some tests overwrite $HOME to prevent them from polluting user files,
  " we need to remember the original value so that we can tell external systems
  " where to ask about their own user settings.
  let g:tester_HOME = $HOME
endif

source setup.vim