Move test.test_support.catch_warning() to the warnings module, rename it
catch_warnings(), and clean up the API.
While expanding the test suite, a bug was found where a warning about the
'line' argument to showwarning() was not letting functions with '*args' go
without a warning.
Closes issue 3602.
Code review by Benjamin Peterson.
diff --git a/Misc/NEWS b/Misc/NEWS
index 73bcf08..76df45c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -53,6 +53,11 @@
Library
-------
+- Issue 3602: Moved test.test_support.catch_warning() to
+ warnings.catch_warnings() along with some API cleanup. Expanding the tests
+ for catch_warnings() also led to an improvement in the raising of a
+ DeprecationWarning related to warnings.warn_explicit().
+
- The deprecation warnings for the old camelCase threading API were removed.
- logging: fixed lack of use of encoding attribute specified on a stream.