Merge pull request #15710 from zuhao/refactor_actionview_digestor_test

Make sure restoration always happen.

actionview/test/template/digestor_test.rb

@@ -233,6 +233,7 @@ def test_cache_template_loading
     assert_digest_difference("messages/edit", true) do
       change_template("comments/_comment")
     end
+  ensure
     ActionView::Resolver.caching = resolver_before
   end