patch 9.1.0539: Not enough tests for what v9.1.0535 fixed

Problem:  Not enough tests for what v9.1.0535 fixed
Solution: Add another test for ex-mode

This comes from: https://groups.google.com/g/vim_dev/c/F5-tDqoafz8/m/GqKF-uQsLD0J

related: #15120

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_ex_mode.vim b/src/testdir/test_ex_mode.vim
index 12e983f..6969d5e 100644
--- a/src/testdir/test_ex_mode.vim
+++ b/src/testdir/test_ex_mode.vim
Binary files differ