Re-activate contested N5 test

Author: joshmoore

zarr/tests/test_storage.py

@@ -1207,7 +1207,7 @@ def test_chunk_nesting(self):
         assert 'foo/10.20.30' in store
         assert b'yyy' == store['foo/10.20.30']
         # N5 reverses axis order
-        # assert b'yyy' == store['foo/30/20/10']
+        assert b'yyy' == store['foo/30/20/10']
         store['42'] = b'zzz'
         assert '42' in store
         assert b'zzz' == store['42']