Some cleanup in the docs.
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 9e8f3e3..717731a 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -60,7 +60,7 @@
    where only the most recent activity is of interest.
 
    .. versionchanged:: 2.6
-      Added *maxlen*
+      Added *maxlen* parameter.
 
 Deque objects support the following methods: