Record version added as 3.1.

diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index ef1bca2797805e51f99c5217db36c12f60f985d6..1a23fca31d0995b742b444bbf58954b3a904fb08 100644 (file)
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -367,7 +367,7 @@ counts, but the output will exclude results with counts of zero or less.
 
       Maximum size of a deque or *None* if unbounded.
 
-      .. versionadded:: 2.7
+      .. versionadded:: 3.1
 
 
 In addition to the above, deques support iteration, pickling, ``len(d)``,