patch 9.0.0650: some tests are failing

Problem:    Some tests are failing.
Solution:   Adjust for "<<<" showing up.
diff --git a/src/testdir/test_listlbr.vim b/src/testdir/test_listlbr.vim
index 24bd256..97d6ccd 100644
--- a/src/testdir/test_listlbr.vim
+++ b/src/testdir/test_listlbr.vim
@@ -159,7 +159,7 @@
   exe "norm! $3B\<C-v>eAx\<Esc>"
   let lines = s:screen_lines([1, 10], winwidth(0))
   let expect = [
-\ "foobar foobar       ",
+\ "<<<bar foobar       ",
 \ "foobar foobar       ",
 \ "foobar foobar       ",
 \ "foobar foobar       ",