warnings.catch_warnings() now returns a list or None instead of the custom
WarningsRecorder object. This makes the API simpler to use as no special object
must be learned.

Closes issue 3781.
Review by Benjamin Peterson.
diff --git a/Misc/NEWS b/Misc/NEWS
index b2da2c5..b7da5f1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -60,6 +60,9 @@
 Library
 -------
 
+- Issue 3781: Clean up the API for warnings.catch_warnings() by having it
+  return a list or None rather than a custom object.
+
 - Issue #1638033: Cookie.Morsel gained the httponly attribute.
 
 - Issue #3535: zipfile couldn't read some zip files larger than 2GB.