Add missing versionadded tag.

diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 17e3890a9060241ccceeb84487f4dbc012c02135..96bbe14ff06d5ecdb41736bfa4db01abc76f7ad8 100644 (file)
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -617,6 +617,8 @@ always available.
    Bool containing the status of the Python 3.0 warning flag. It's ``True``
    when Python is started with the -3 option.
 
+   .. versionadded:: 2.6
+
 
 .. data:: dont_write_bytecode