patch 8.0.1361: some users don't want to diff with hidden buffers
Problem: Some users don't want to diff with hidden buffers.
Solution: Add the "hiddenoff" item to 'diffopt'. (Alisue, closes #2394)
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index 3273dcb..d6c5c83 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -375,6 +375,29 @@
%bwipe
endfunc
+func Test_diffopt_hiddenoff()
+ set diffopt=filler,foldcolumn:0,hiddenoff
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+ botright vert new two
+ call setline(1, ['One', 'Four'])
+ diffthis
+ redraw
+ call assert_notequal(normattr, screenattr(1, 1))
+ set hidden
+ close
+ redraw
+ " should not diffing with hidden buffer two while 'hiddenoff' is enabled
+ call assert_equal(normattr, screenattr(1, 1))
+
+ bwipe!
+ bwipe!
+ set hidden& diffopt&
+endfunc
+
func Test_diffoff_hidden()
set diffopt=filler,foldcolumn:0
e! one