More notes about r78946, this time describing the restore_signals behavior.
diff --git a/Misc/NEWS b/Misc/NEWS
index f937d55..8651d1f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -287,6 +287,11 @@
by an extension module (_posixsubprocess) so that the fork()+exec() can be
done safely without the possibility of deadlock in multithreaded applications.
+- subprocess.Popen now has restore_signals and start_new_session features.
+ The default of restore_signals=True is a new behavior compared to earlier
+ Python versions. This means that signals such as SIGPIPE are not ignored
+ by default in subprocesses launched by Python (Issue #1652).
+
- Issue #6472: The xml.etree package is updated to ElementTree 1.3. The
cElementTree module is updated too.