Tweak error message: "PEP-764" -> "PEP 764"

Author: brianschubert

mypy/typeanal.py

@@ -1363,15 +1363,15 @@ def visit_typeddict_type(self, t: TypedDictType) -> Type:
                 self.note("Did you mean TypedDict[...]?", t)
             if t.is_pep764 and NEW_INLINE_TYPEDDICT not in self.options.enable_incomplete_feature:
                 self.fail(
-                    "PEP-764 inline TypedDict is experimental,"
+                    "PEP 764 inline TypedDict is experimental,"
                     f" must be enabled with --enable-incomplete-feature={NEW_INLINE_TYPEDDICT}",
                     t,
                 )
             required_keys = req_keys
             fallback = self.named_type("typing._TypedDict")
             if t.is_pep764 and t.extra_items_from:
                 self.fail(
-                    "PEP-764 inline TypedDict does not support merge-in", t, code=codes.VALID_TYPE
+                    "PEP 764 inline TypedDict does not support merge-in", t, code=codes.VALID_TYPE
                 )
                 return AnyType(TypeOfAny.from_error)
             for typ in t.extra_items_from:

test-data/unit/check-typeddict.test

@@ -3774,7 +3774,7 @@ from typing_extensions import TypeAlias
 
 T = TypeVar("T")
 X: TypeAlias = TypedDict[{"item": T}]
-x: TypedDict[{"a": int, **X[str], "b": int}]  # E: PEP-764 inline TypedDict does not support merge-in
+x: TypedDict[{"a": int, **X[str], "b": int}]  # E: PEP 764 inline TypedDict does not support merge-in
 reveal_type(x)  # N: Revealed type is "Any"
 [builtins fixtures/dict.pyi]
 [typing fixtures/typing-full.pyi]