Issue #15225: improve error message when hmac is passed a wrong key type.
Patch by Marc Abramowitz.
diff --git a/Misc/ACKS b/Misc/ACKS
index e2a4f9b..9af9dcd 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -13,6 +13,7 @@
 
 Rajiv Abraham
 David Abrahams
+Marc Abramowitz
 Ron Adam
 Ali Afshar
 Jim Ahlstrom