Add bounded pinned-circle manual L2 remapping

tests/unit/test_synchronized_remap.py

@@ -185,7 +185,7 @@ class SynchronizedRemapTests(unittest.TestCase):
             with self.assertRaises(ValueError):
                 RemapTopology.from_config(replace(CFG, **changes), parent, A)
         for kwargs in (dict(coarse_boundary='slot_reservoir'), dict(objects=(object(),))):
-            with self.assertRaisesRegex(ValueError, 'body-free periodic'):
+            with self.assertRaisesRegex(ValueError, 'periodic 2D'):
                 RemapTopology.from_config(CFG, parent, A, **kwargs)
         different = topology(A, cfg=replace(CFG, viscosity=.12))
         with self.assertRaisesRegex(ValueError, 'unchanged'):