Issue #12546: Allow \x00 as a fill character for builtin type __format__ methods.
diff --git a/Misc/NEWS b/Misc/NEWS
index 79eaada..f6a2c65 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -40,6 +40,9 @@
 - Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2
   billion characters) input strings in _Py_dg_strtod.
 
+- Issue #12546: Allow \x00 to be used as a fill character when using str, int,
+  float, and complex __format__ methods.
+
 Library
 -------