patch 8.1.1733: the man ftplugin leaves an empty buffer behind commit https://github.com/vim/vim/commit/e5e6950193ddf365c6c507ddefcd7f9db939e5ac Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jul 22 22:09:21 2019 +0200 patch 8.1.1733: the man ftplugin leaves an empty buffer behind Problem: The man ftplugin leaves an empty buffer behind. Solution: Don't make new window and edit, use split. (Jason Franklin)

function Test_Comparators()
  try
    let oldisident=&isident
    set isident+=#
    call assert_equal(1, 1 is#1)
  finally
    let &isident=oldisident
  endtry
endfunction