patch 8.0.0372: more options are not always defined
Problem: More options are not always defined.
Solution: Consistently define all possible options.
diff --git a/src/testdir/test_expand_dllpath.vim b/src/testdir/test_expand_dllpath.vim
index d8ab416..b3e099a 100644
--- a/src/testdir/test_expand_dllpath.vim
+++ b/src/testdir/test_expand_dllpath.vim
@@ -14,7 +14,7 @@
endfunc
func s:generate_test_if_exists(optname)
- if exists('&' . a:optname)
+ if exists('+' . a:optname)
execute join([
\ 'func Test_expand_' . a:optname . '()',
\ ' call s:test_expand_dllpath("' . a:optname . '")',