patch 8.1.2019: 'cursorline' always highlights the whole line

Problem:    'cursorline' always highlights the whole line.
Solution:   Add 'cursorlineopt' to specify what is highlighted.
            (closes #4693)
diff --git a/src/testdir/test_alot.vim b/src/testdir/test_alot.vim
index ab1dac4..e3ce1e1 100644
--- a/src/testdir/test_alot.vim
+++ b/src/testdir/test_alot.vim
@@ -9,6 +9,7 @@
 source test_changedtick.vim
 source test_compiler.vim
 source test_cursor_func.vim
+source test_cursorline.vim
 source test_delete.vim
 source test_ex_equal.vim
 source test_ex_undo.vim