Move note about the implementation in the "seealso".
diff --git a/Doc/whatsnew/3.3.rst b/Doc/whatsnew/3.3.rst
index 280d13b..be873ea 100644
--- a/Doc/whatsnew/3.3.rst
+++ b/Doc/whatsnew/3.3.rst
@@ -116,12 +116,10 @@
file whose existence signals the base of a virtual environment's directory
tree.
-(Implemented by Carl Meyer and Vinay Sajip.)
-
.. seealso::
:pep:`405` - Python Virtual Environments
- PEP written by Carl Meyer
+ PEP written by Carl Meyer; implementation by Carl Meyer and Vinay Sajip
PEP 420: Namespace Packages