add test_approved_application_not_in_active_requests unit test and lint

src/registrar/tests/test_views.py

@@ -1500,3 +1500,18 @@ class TestApplicationStatus(TestWithUser, WebTest):
                         reverse(url_name, kwargs={"pk": application.pk})
                     )
                     self.assertEqual(page.status_code, 403)
+
+    def test_approved_application_not_in_active_requests(self):
+        """An approved application is not shown in the Active
+        Requests table on home.html."""
+        application = completed_application(
+            status=DomainApplication.APPROVED, user=self.user
+        )
+        application.save()
+
+        home_page = self.app.get("/")
+        # This works in our test environment because creating
+        # an approved application here does not generate a
+        # domain object, so we do not expect to see 'city.gov'
+        # in either the Domains or Requests tables.
+        self.assertNotContains(home_page, "city.gov")