Library
-------
+- A new version of typing.py provides several new classes and
+ features: @overload outside stubs, Reversible, DefaultDict, Text,
+ ContextManager, Type[], NewType(), TYPE_CHECKING, and numerous bug
+ fixes (note that some of the new features are not yet implemented in
+ mypy or other static analyzers). Also classes for PEP 492
+ (Awaitable, AsyncIterable, AsyncIterator) have been added (in fact
+ they made it into 3.5.1 but were never mentioned).
+
- Issue #25738: Stop http.server.BaseHTTPRequestHandler.send_error() from
sending a message body for 205 Reset Content. Also, don't send Content
header fields in responses that don't have a body. Patch by Susumu