Docs were added about a month ago
diff --git a/Misc/NEWS b/Misc/NEWS
index 68ff040..033c5c8 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -498,8 +498,7 @@
set type using the keys of a dict to represent the set. There's
also a class ImmutableSet which is useful when you need sets of sets
or when you need to use sets as dict keys, and a class BaseSet which
- is the base class of the two. (This is not documented yet, but
- help(sets) gives a wealth of information.)
+ is the base class of the two.
- Added operator.pow(a,b) which is equivalent to a**b.