patch 8.2.3549: mistakes in test comments

Problem:    Mistakes in test comments.
Solution:   Fix the comments. (closes #9029)
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 3893b79..8161183 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
Binary files differ