Document that `test.support.bytecode_helper` is new in 3.9 (GH-22618)

diff --git a/Doc/library/test.rst b/Doc/library/test.rst
index 6495b4844449e59fcd66a3ffc36e961020c47ddd..ce6b868458ea4f529003d9ea9535bba99fabaf34 100644 (file)
--- a/Doc/library/test.rst
+++ b/Doc/library/test.rst
@@ -1168,6 +1168,8 @@ script execution tests.
 The :mod:`test.support.bytecode_helper` module provides support for testing
 and inspecting bytecode generation.
 
+.. versionadded:: 3.9
+
 The module defines the following class:
 
 .. class:: BytecodeTestCase(unittest.TestCase)