Issue 22803:  Add missing versionadded directive.
diff --git a/Doc/library/textwrap.rst b/Doc/library/textwrap.rst
index edf1fd6..9fe7a35 100644
--- a/Doc/library/textwrap.rst
+++ b/Doc/library/textwrap.rst
@@ -113,6 +113,8 @@
       +
       + world
 
+   .. versionadded:: 3.3
+
 
 :func:`wrap`, :func:`fill` and :func:`shorten` work by creating a
 :class:`TextWrapper` instance and calling a single method on it.  That