gh-117194: Properly format 'base64' header in What's New (#117198)

terryjreedy · web-flow · commit 78a651fd7fbe · 2024-03-24T11:38:34.000-04:00
It needs 6, not 3, '-'s.
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
@@ -284,7 +284,7 @@ asyncio
   (Contributed by Pierre Ossman in :gh:`113538`.)
 
 base64
----
+------
 
 * Add :func:`base64.z85encode` and :func:`base64.z85decode` functions which allow encoding
   and decoding z85 data.
