patch 8.2.1771: synIDattr() cannot get the value of ctermul
Problem: synIDattr() cannot get the value of ctermul.
Solution: Add the "ul" value for "what". (closes #7037)
diff --git a/src/testdir/test_highlight.vim b/src/testdir/test_highlight.vim
index 05f215a..8bd03e2 100644
--- a/src/testdir/test_highlight.vim
+++ b/src/testdir/test_highlight.vim
@@ -808,6 +808,7 @@
call assert_notmatch('ctermul=', HighlightArgs('Normal'))
highlight Normal ctermul=3
call assert_match('ctermul=3', HighlightArgs('Normal'))
+ call assert_equal('3', synIDattr(synIDtrans(hlID('Normal')), 'ul'))
highlight Normal ctermul=NONE
endfunc