patch 8.2.3886: can define autocmd for every event by using "au!"
Problem: Can define autocmd for every event by using "au!".
Solution: Check if a command is present also for "au!".
diff --git a/src/testdir/test_arglist.vim b/src/testdir/test_arglist.vim
index ca7e2f8..9f9957a 100644
--- a/src/testdir/test_arglist.vim
+++ b/src/testdir/test_arglist.vim
@@ -581,7 +581,7 @@
func Test_clear_arglist_in_all()
n 0 00 000 0000 00000 000000
- au! * 0 n 0
+ au WinNew 0 n 0
call assert_fails("all", "E1156")
au! *
endfunc
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 4bdb8dc..b6f621d 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
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