Correct version change in Lock docstring

diff --git a/tornado/locks.py b/tornado/locks.py
index a1817728611ec77240c4055043038984bf3752fc..abf5eade85e6c03be750af4599c10f3758604353 100644 (file)
--- a/tornado/locks.py
+++ b/tornado/locks.py
@@ -465,7 +465,7 @@ class Lock(object):
     ...
     ...    # Now the lock is released.
 
-    .. versionchanged:: 3.5
+    .. versionchanged:: 4.3
        Added ``async with`` support in Python 3.5.
 
     """