Add Misc/NEWS entry for r79609.
diff --git a/Misc/NEWS b/Misc/NEWS
index 1f715b9..e942fb7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -47,6 +47,12 @@
 Library
 -------
 
+- Issue #8257: The Decimal construct now accepts a float instance
+  directly, converting that float to a Decimal of equal value:
+
+     >>> Decimal(1.1)
+     Decimal('1.100000000000000088817841970012523233890533447265625')
+
 - collections.Counter() now supports a subtract() method.
 
 - Issue #8294: The Fraction constructor now accepts Decimal and float