bpo-37266: Add bpo number to the What's New entry (GH614584)

vstinner · web-flow · commit b4e68960b906 · 2019-07-04T18:30:19.000+02:00
To get more info about this change.
diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
@@ -110,6 +110,7 @@ In a subinterpreter, spawning a daemon thread now raises an exception. Daemon
 threads were never supported in subinterpreters. Previously, the subinterpreter
 finalization crashed with a Python fatal error if a daemon thread was still
 running.
+(Contributed by Victor Stinner in :issue:`37266`.)
 
 pprint
 ------
