patch 9.0.0681: "<<<" shows for 'smoothscroll' even when 'showbreak is set

Problem:    "<<<" shows for 'smoothscroll' even when 'showbreak is set.
Solution:   When 'showbreak' is set do not display "<<<".
diff --git a/src/testdir/test_breakindent.vim b/src/testdir/test_breakindent.vim
index 289dc08..ad6516f 100644
--- a/src/testdir/test_breakindent.vim
+++ b/src/testdir/test_breakindent.vim
@@ -660,7 +660,7 @@
   norm! 5gj
   let lines = s:screen_lines(1, 20)
   let expect = [
-	\ "<<<aaaaaaaaaaaaaaaaa",
+	\ ">aaaaaaaaaaaaaaaaaaa",
 	\ ">aaaaaaaaaaaaaaaaaaa",
 	\ ">aaaaaaaaaaaaaaaaaaa",
 	\ ]