Issue #13637: "a2b" functions in the binascii module now accept ASCII-only unicode strings.
diff --git a/Misc/NEWS b/Misc/NEWS
index 7f72133..6955258 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -419,6 +419,9 @@
 Library
 -------
 
+- Issue #13637: "a2b" functions in the binascii module now accept ASCII-only
+  unicode strings.
+
 - Issue #13634: Add support for querying and disabling SSL compression.
 
 - Issue #13627: Add support for SSL Elliptic Curve-based Diffie-Hellman