patch 8.0.0180: error E937 is used twice commit https://github.com/vim/vim/commit/83381f7129aca00bc2dd24527f160bc6a60d70af Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 14 14:36:08 2017 +0100 patch 8.0.0180: error E937 is used twice Problem: Error E937 is used both for duplicate key in JSON and for trying to delete a buffer that is in use. Solution: Rename the JSON error to E938. (Norio Takagi, closes #1376)

" 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