patch 8.0.1220: skipping empty statusline groups is not correct
Problem: Skipping empty statusline groups is not correct.
Solution: Also set group_end_userhl. (itchyny)
diff --git a/src/testdir/test_statusline.vim b/src/testdir/test_statusline.vim
index de943f2..eafbecd 100644
--- a/src/testdir/test_statusline.vim
+++ b/src/testdir/test_statusline.vim
@@ -312,6 +312,12 @@
call assert_equal(sa1, sa3)
call assert_equal(sa1, sa4)
+ let g:a = ''
+ set statusline=%#Error#{%(\ %{g:a}\ %)}
+ call assert_match('^{}\s*$', s:get_statusline())
+ let g:a = 'X'
+ call assert_match('^{ X }\s*$', s:get_statusline())
+
" %%: a percent sign.
set statusline=10%%
call assert_match('^10%\s*$', s:get_statusline())