Fix various ParamSpec errors in typing (GH-24176)
1. ParamSpec -> TypeVar for ``typing.Concatenate``
2. ParamSpec's call signature should align with its documentation.
Noticed in GH-24169
diff --git a/Lib/typing.py b/Lib/typing.py
index 88d0d62..6224930 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -779,7 +779,7 @@ def add_two(x: float, y: float) -> float:
args = object()
kwargs = object()
- def __init__(self, name, bound=None, covariant=False, contravariant=False):
+ def __init__(self, name, *, bound=None, covariant=False, contravariant=False):
self.__name__ = name
super().__init__(bound, covariant, contravariant)
try: