bpo-39130: Dict reversed was added in v3.8 so should say in the doc as well (GH-17694)

To be consistent with document layout, it should say when the feature was added.
Although it's mentioned few other places in the doc but it's not explicitly say that at that place.

https://bugs.python.org/issue39130
(cherry picked from commit 94d9cfc4ed9dd3c4a3a359bc194b4dc3f6ba63eb)

Co-authored-by: Khalid Mammadov <khalidmammadov9@gmail.com>

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index be72695462c7bc9c265928450c25daa3aa429e58..d6db9b5411d8a6e6e630bb259eb90e987c2fa3cd 100644 (file)
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -4326,6 +4326,8 @@ pairs within braces, for example: ``{'jack': 4098, 'sjoerd': 4127}`` or ``{4098:
       Return a reverse iterator over the keys of the dictionary. This is a
       shortcut for ``reversed(d.keys())``.
 
+      .. versionadded:: 3.8
+
    .. method:: setdefault(key[, default])
 
       If *key* is in the dictionary, return its value.  If not, insert *key*