patch 8.2.4700: buffer remains active if WinClosed event throws an exception

Problem:    Buffer remains active if a WinClosed event throws an exception.
Solution:   Ignore aborting() when closing the buffer. (closes #10097)
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 39ba9af..89023a1 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
Binary files differ