Handle add_note in exc

Author: linuxdaemon

tests/plugin_tests/test_chan_log.py

@@ -6,6 +6,9 @@
 def test_format_exception_chain():
     def _get_data(exc):
         yield repr(exc)
+        if hasattr(exc, 'add_note'):
+            yield f"  add_note = {exc.add_note!r}"
+
         yield f"  args = {exc.args!r}"
         yield f"  with_traceback = {exc.with_traceback!r}"
         yield ""