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Co-authored-by: Jelle Zijlstra <[email protected]>

Author: Daraan

CHANGELOG.md

@@ -16,8 +16,8 @@
   subscripted objects) had wrong parameters if they were directly
   subscripted with an `Unpack` object.
   Patch by [Daraan](https://github.com/Daraan).
-- Backport to Python 3.10 to support substitution with `...` on Callable
-  aliases that have a Concatenate argument. Patch by [Daraan](https://github.com/Daraan).
+- Backport to Python 3.10 to support substitution with `...` on `Callable`
+  aliases that have a `Concatenate` argument. Patch by [Daraan](https://github.com/Daraan).
 
 # Release 4.12.2 (June 7, 2024)
 

src/test_typing_extensions.py

@@ -5401,7 +5401,7 @@ def test_invalid_uses(self):
             ):
                 Concatenate[1, P]
 
-    @skipUnless(TYPING_3_10_0, "Missing backported to <=3.9. See issue #48")
+    @skipUnless(TYPING_3_10_0, "Missing backport to <=3.9. See issue #48")
     def test_alias_subscription_with_ellipsis(self):
         P = ParamSpec('P')
         X = Callable[Concatenate[int, P], Any]

src/typing_extensions.py

@@ -1830,7 +1830,7 @@ def _concatenate_getitem(self, parameters):
                         "ParamSpec variable or ellipsis.")
     msg = "Concatenate[arg, ...]: each arg must be a type."
     parameters = tuple(typing._type_check(p, msg) for p in parameters)
-    if (3, 10, 2) < sys.version_info < (3,11):
+    if (3, 10, 2) < sys.version_info < (3, 11):
         return _ConcatenateGenericAlias(self, parameters,
                                  _typevar_types=(TypeVar, ParamSpec),
                                  _paramspec_tvars=True)