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)

" Test for joining lines.

func Test_join_with_count()
  new
  call setline(1, ['one', 'two', 'three', 'four'])
  normal J
  call assert_equal('one two', getline(1))
  %del
  call setline(1, ['one', 'two', 'three', 'four'])
  normal 10J
  call assert_equal('one two three four', getline(1))
  quit!
endfunc