chore: import upstream snapshot with attribution

spacy/tests/test_errors.py

@@ -0,0 +1,16 @@
+from inspect import isclass
+
+import pytest
+
+from spacy.errors import ErrorsWithCodes
+
+
+class Errors(metaclass=ErrorsWithCodes):
+    E001 = "error description"
+
+
+def test_add_codes():
+    assert Errors.E001 == "[E001] error description"
+    with pytest.raises(AttributeError):
+        Errors.E002
+    assert isclass(Errors.__class__)