Update lib: Tornado

libs/tornado/concurrent.py

@@ -60,7 +60,7 @@ class Future(object):
     This functionality was previously available in a separate class
     ``TracebackFuture``, which is now a deprecated alias for this class.
 
-    .. versionchanged:: 3.3
+    .. versionchanged:: 4.0
        `tornado.concurrent.Future` is always a thread-unsafe ``Future``
        with support for the ``exc_info`` methods.  Previously it would
        be an alias for the thread-safe `concurrent.futures.Future`
@@ -152,7 +152,7 @@ class Future(object):
     def exc_info(self):
         """Returns a tuple in the same format as `sys.exc_info` or None.
 
-        .. versionadded:: 3.3
+        .. versionadded:: 4.0
         """
         return self._exc_info
 
@@ -161,7 +161,7 @@ class Future(object):
 
         Preserves tracebacks on Python 2.
 
-        .. versionadded:: 3.3
+        .. versionadded:: 4.0
         """
         self._exc_info = exc_info
         self.set_exception(exc_info[1])