Issue #28300: Fix typos, patch by Shlomi Fish

Lib/idlelib/README.txt

@@ -16,7 +16,7 @@ and omissions and lag behind changes in idlelib.
 
 
 IDLELIB FILES
-Implemetation files not in IDLE MENU are marked (nim).
+Implementation files not in IDLE MENU are marked (nim).
 Deprecated files and objects are listed separately as the end.
 
 Startup

Lib/test/test_argparse.py

@@ -4550,7 +4550,7 @@ class TestNamespace(TestCase):
         self.assertTrue(ns2 != ns3)
         self.assertTrue(ns2 != ns4)
 
-    def test_equality_returns_notimplemeted(self):
+    def test_equality_returns_notimplemented(self):
         # See issue 21481
         ns = argparse.Namespace(a=1, b=2)
         self.assertIs(ns.__eq__(None), NotImplemented)