patch 8.2.1054: not so easy to pass a lua function to Vim Commit: https://github.com/vim/vim/commit/801ab069341c8652680d63c174530fd4feb2911e Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 25 19:27:56 2020 +0200 patch 8.2.1054: not so easy to pass a lua function to Vim Problem: Not so easy to pass a lua function to Vim. Solution: Convert a Lua function and closure to a Vim funcref. (Prabir Shrestha, closes #6246)

func Test_empty_buffer()
  new
  insert
a
b
c
d
.
  call assert_equal(1, line("''"))
  bwipe!
endfunc