Apply ruff/flake8-pyi rule PYI055

PYI055 Multiple `type` members in a union. Combine them into one.

Author: DimitriPapadopoulos

tests/v3/test_array.py

@@ -27,7 +27,7 @@ def test_array_creation_existing_node(
     """
     spath = StorePath(store)
     group = Group.from_store(spath, zarr_format=zarr_format)
-    expected_exception: type[ContainsArrayError] | type[ContainsGroupError]
+    expected_exception: type[ContainsArrayError | ContainsGroupError]
     if extant_node == "array":
         expected_exception = ContainsArrayError
         _ = group.create_array("extant", shape=(10,), dtype="uint8")

tests/v3/test_group.py

@@ -468,7 +468,7 @@ def test_group_creation_existing_node(
     """
     spath = StorePath(store)
     group = Group.from_store(spath, zarr_format=zarr_format)
-    expected_exception: type[ContainsArrayError] | type[ContainsGroupError]
+    expected_exception: type[ContainsArrayError | ContainsGroupError]
     attributes: dict[str, JSON] = {"old": True}
 
     if extant_node == "array":