patch 8.1.1739: deleted match highlighting not updated in other window commit https://github.com/vim/vim/commit/06029a857a3d4d90b3162090506c1e00dc84c60b Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 24 14:25:26 2019 +0200 patch 8.1.1739: deleted match highlighting not updated in other window Problem: Deleted match highlighting not updated in other window. Solution: Mark the window for refresh. (closes https://github.com/vim/vim/issues/4720) Also fix that ambi-width check clears with wrong attributes.

" Tests for the :set command

function Test_set_backslash()
  let isk_save = &isk

  set isk=a,b,c
  set isk+=d
  call assert_equal('a,b,c,d', &isk)
  set isk+=\\,e
  call assert_equal('a,b,c,d,\,e', &isk)
  set isk-=e
  call assert_equal('a,b,c,d,\', &isk)
  set isk-=\\
  call assert_equal('a,b,c,d', &isk)

  let &isk = isk_save
endfunction

function Test_set_add()
  let wig_save = &wig

  set wildignore=*.png,
  set wildignore+=*.jpg
  call assert_equal('*.png,*.jpg', &wig)

  let &wig = wig_save
endfunction