Issue #22003: When initialized from a bytes object, io.BytesIO() now
defers making a copy until it is mutated, improving performance and
memory use on some use cases.

Patch by David Wilson.
diff --git a/Misc/ACKS b/Misc/ACKS
index c1c29d2..07b0647 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1456,6 +1456,7 @@
 Carol Willing
 Steven Willis
 Frank Willison
+David Wilson
 Geoff Wilson
 Greg V. Wilson
 J Derek Wilson