patch 8.1.0851: feedkeys() with "L" does not work properly

Problem:    feedkeys() with "L" does not work properly.
Solution:   Do not set typebuf_was_filled when using "L". (Ozaki Kiichi,
            closes #3885)
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index c502a26..9e8a02c 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -50,7 +50,7 @@
     au CursorHoldI * let g:triggered += 1
     set updatetime=500
     call job_start(has('win32') ? 'cmd /c echo:' : 'echo',
-          \ {'exit_cb': {j, s -> timer_start(1000, 'ExitInsertMode')}})
+          \ {'exit_cb': {-> timer_start(1000, 'ExitInsertMode')}})
     call feedkeys('a', 'x!')
     call assert_equal(1, g:triggered)
     unlet g:triggered