From 883956858206c0ce82a021d4a7a5658008f47722 Mon Sep 17 00:00:00 2001
From: "Nathaniel J. Smith" <njs@pobox.com>
Date: Fri, 6 Mar 2020 04:43:31 -0800
Subject: [PATCH] Fix pendulum.test to properly unwind after an exception
 (#445)

Previously, if an exception occurred inside a 'with pendulum.test(...)'
block, then the monkeypatch would remain in place instead of being
un-done. This could cause confusing results, as one failing test could
cause other tests to run with an unexpected mock in place and cause
other failures.