Blurb

Author: StanFromIreland

Doc/whatsnew/3.15.rst

@@ -233,6 +233,7 @@ Improved error messages
   distributors to pass a `JSON <https://www.json.org/json-en.html>`_
   configuration file containing custom error messages for missing
   :term:`standard library` modules.
+  (Contributed by Stan Ulbrych and Petr Viktorin in :gh:`139707`.)
 
 
 Other language changes

Misc/NEWS.d/next/Build/2025-10-30-10-36-15.gh-issue-139707.QJ1FfJ.rst

@@ -0,0 +1,4 @@
+Add configure option :option:`--with-missing-stdlib-config=FILE` allows
+which distributors to pass a `JSON <https://www.json.org/json-en.html>`_
+configuration file containing custom error messages for missing
+:term:`standard library` modules.