Don't change NameError messages

Benefit isn't as clear as for `AttributeError` -- let's not change it if not necessary

Author: johnslavik

Lib/traceback.py

@@ -1133,7 +1133,7 @@ def __init__(self, exc_type, exc_value, exc_traceback, *, limit=None,
                     # 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}'?"
+                    self._str += f". Did you mean: '{suggestion}'?"
             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: