Issue #11459: A `bufsize` value of 0 in subprocess.Popen() really creates
unbuffered pipes, such that select() works properly on them.
diff --git a/Misc/NEWS b/Misc/NEWS
index f18e557..be44a06 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -40,6 +40,9 @@
Library
-------
+- Issue #11459: A ``bufsize`` value of 0 in subprocess.Popen() really creates
+ unbuffered pipes, such that select() works properly on them.
+
- Issue #5421: Fix misleading error message when one of socket.sendto()'s
arguments has the wrong type. Patch by Nikita Vetoshkin.