Update test_cmd_line and test_ctypes

Author: vstinner

Lib/test/test_cmd_line.py

@@ -491,7 +491,7 @@ def test_stdout_flush_at_shutdown(self):
         rc, out, err = assert_python_failure('-c', code)
         self.assertEqual(b'', out)
         self.assertEqual(120, rc)
-        self.assertIn(b'Exception ignored on flushing sys.stdout:\n'
+        self.assertIn(b'Exception ignored when flushing sys.stdout:\n'
                       b'OSError: '.replace(b'\n', os.linesep.encode()),
                       err)
 

Lib/test/test_ctypes/test_callbacks.py

@@ -324,7 +324,7 @@ def func():
 
             self.assertIsInstance(cm.unraisable.exc_value, TypeError)
             self.assertEqual(cm.unraisable.err_msg,
-                             f"Exception ignored on converting result "
+                             f"Exception ignored when converting result "
                              f"of ctypes callback function {func!r}")
             self.assertIsNone(cm.unraisable.object)
 

Lib/test/test_ctypes/test_random_things.py

@@ -51,7 +51,7 @@ def expect_unraisable(self, exc_type, exc_msg=None):
             if exc_msg is not None:
                 self.assertEqual(str(cm.unraisable.exc_value), exc_msg)
             self.assertEqual(cm.unraisable.err_msg,
-                             f"Exception ignored on calling ctypes "
+                             f"Exception ignored when calling ctypes "
                              f"callback function {callback_func!r}")
             self.assertIsNone(cm.unraisable.object)