Silence spurious "broken pipe" tracebacks when shutting down a ProcessPoolExecutor.
diff --git a/Misc/NEWS b/Misc/NEWS
index 8d7fb16..53465b4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -228,6 +228,9 @@
 Library
 -------
 
+- Silence spurious "broken pipe" tracebacks when shutting down a
+  ProcessPoolExecutor.
+
 - Fix potential resource leaks in concurrent.futures.ProcessPoolExecutor
   by joining all queues and processes when shutdown() is called.