patch 8.0.0160: EMSG() is sometimes used where it should be IEMSG() commit https://github.com/vim/vim/commit/de33011ec623fd562419dede6bf465b5b9881a20 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 8 20:50:52 2017 +0100 patch 8.0.0160: EMSG() is sometimes used where it should be IEMSG() Problem: EMSG() is sometimes used for internal errors. Solution: Change them to IEMSG(). (Dominique Pelle) And a few more.

" Common preparations for running tests.

" Make sure 'runtimepath' and 'packpath' does not include $HOME.
set rtp=$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after
if has('packages')
  let &packpath = &rtp
endif

" Only when the +eval feature is present. 
if 1
  " Make sure $HOME does not get read or written.
  let $HOME = '/does/not/exist'
endif