Fixed #31327 -- Deprecated providing_args argument for Signal.

tests/signals/test_deprecation.py

@@ -0,0 +1,22 @@
+import warnings
+
+from django.dispatch import Signal
+from django.test import SimpleTestCase
+from django.utils.deprecation import RemovedInDjango40Warning
+
+
+class SignalDeprecationTests(SimpleTestCase):
+    def test_providing_args_warning(self):
+        msg = (
+            'The providing_args argument is deprecated. As it is purely '
+            'documentational, it has no replacement. If you rely on this '
+            'argument as documentation, you can move the text to a code '
+            'comment or docstring.'
+        )
+        with self.assertWarnsMessage(RemovedInDjango40Warning, msg):
+            Signal(providing_args=['arg1', 'arg2'])
+
+    def test_without_providing_args_does_not_warn(self):
+        with warnings.catch_warnings(record=True) as recorded:
+            Signal()
+        self.assertEqual(len(recorded), 0)