LANGUAGE_CODE should contain hyphens, not underscores

misago/core/tests/test_views.py

@@ -5,12 +5,12 @@ from django.test import TestCase
 class MomentJSCatalogViewTests(TestCase):
     def test_moment_js_catalog_view_returns_200(self):
         """moment.js catalog view has no show-stoppers"""
-        with self.settings(LANGUAGE_CODE='en_us'):
+        with self.settings(LANGUAGE_CODE='en-us'):
             response = self.client.get('/moment-i18n.js')
             self.assertEqual(response.status_code, 200)
             self.assertEqual(response.content, b"")
 
-        with self.settings(LANGUAGE_CODE='pl_pl'):
+        with self.settings(LANGUAGE_CODE='pl-pl'):
             response = self.client.get('/moment-i18n.js')
             self.assertContains(response, "// locale : polish (pl)")