Prepend with a dot for better understanding

Author: johnslavik

Lib/traceback.py

@@ -1129,7 +1129,11 @@ def __init__(self, exc_type, exc_value, exc_traceback, *, limit=None,
             wrong_name = getattr(exc_value, "name", None)
             suggestion = _compute_suggestion_error(exc_value, exc_traceback, wrong_name)
             if suggestion:
-                self._str += f". Did you mean '{suggestion}' instead of '{wrong_name}'?"
+                if issubclass(exc_type, AttributeError):
+                    # Prepend with a dot for better understanding. See GH-144285.
+                    self._str += f". Did you mean '.{suggestion}' instead of '.{wrong_name}'?"
+                else:  # NameError
+                    self._str += f". Did you mean '{suggestion}' instead of '{wrong_name}'?"
             if issubclass(exc_type, NameError):
                 wrong_name = getattr(exc_value, "name", None)
                 if wrong_name is not None and wrong_name in sys.stdlib_module_names: