wrong version number in doc changes committed in r67979
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index 96eebf2..f86fda0 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -622,7 +622,7 @@
fails if no exception is raised. To catch any of a group of exceptions, a tuple
containing the exception classes may be passed as *exception*.
- .. versionchanged:: 2.2
+ .. versionchanged:: 2.7
If *callable* is omitted or None, returns a context manager so that the code
under test can be written inline rather than as a function::