patch 8.1.0377: xdiff doesn't use the Vim memory allocation functions commit https://github.com/vim/vim/commit/42335f50bc6fac444a8af74c81df8369d722a6fb Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 13 15:33:43 2018 +0200 patch 8.1.0377: xdiff doesn't use the Vim memory allocation functions Problem: Xdiff doesn't use the Vim memory allocation functions. Solution: Change the xdl_ defines. Check for out-of-memory. Rename "ignored" to "vim_ignored".

" Test feedkeys() function.

func Test_feedkeys_x_with_empty_string()
  new
  call feedkeys("ifoo\<Esc>")
  call assert_equal('', getline('.'))
  call feedkeys('', 'x')
  call assert_equal('foo', getline('.'))

  " check it goes back to normal mode immediately.
  call feedkeys('i', 'x')
  call assert_equal('foo', getline('.'))
  quit!
endfunc