Issue #9738: PyUnicode_FromFormat() and PyErr_Format() raise an error on
a non-ASCII byte in the format string.
Document also the encoding.
diff --git a/Misc/NEWS b/Misc/NEWS
index 04eb82f..ca64883 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
Core and Builtins
-----------------
+- Issue #9738: PyUnicode_FromFormat() and PyErr_Format() raise an error on
+ a non-ASCII byte in the format string.
+
- Issue #4617: Previously it was illegal to delete a name from the local
namespace if it occurs as a free variable in a nested block. This limitation
of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF).