pythongh-146656: properly raise NotImplementedError instead of NotImplemented in test_discover (python#146661)

Co-authored-by: AN Long <aisk@users.noreply.github.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Filipe Laíns <filipe.lains@gmail.com>

Author: 4 people

Lib/test/test_importlib/test_discover.py

@@ -11,7 +11,7 @@ def __init__(self, discover=[]):
         self._discovered_values = discover
 
     def find_spec(self, fullname, path=None, target=None):
-        raise NotImplemented
+        raise NotImplementedError
 
     def discover(self, parent=None):
         yield from self._discovered_values