Use PEP 585 syntax in Python 2, protobuf & _ast stubs, where possible (#6949)

stdlib/@python2/multiprocessing/dummy/__init__.pyi

@@ -2,7 +2,7 @@ import array
 import threading
 import weakref
 from Queue import Queue
-from typing import Any, List
+from typing import Any
 
 class DummyProcess(threading.Thread):
     _children: weakref.WeakKeyDictionary[Any, Any]
@@ -35,7 +35,7 @@ JoinableQueue = Queue
 def Array(typecode, sequence, lock=...) -> array.array[Any]: ...
 def Manager() -> Any: ...
 def Pool(processes=..., initializer=..., initargs=...) -> Any: ...
-def active_children() -> List[Any]: ...
+def active_children() -> list[Any]: ...
 def current_process() -> threading.Thread: ...
 def freeze_support() -> None: ...
 def shutdown() -> None: ...

stdlib/@python2/multiprocessing/dummy/connection.pyi

@@ -1,7 +1,7 @@
 from Queue import Queue
-from typing import Any, List, Tuple
+from typing import Any
 
-families: List[None]
+families: list[None]
 
 class Connection(object):
     _in: Any
@@ -22,4 +22,4 @@ class Listener(object):
     def close(self) -> None: ...
 
 def Client(address) -> Connection: ...
-def Pipe(duplex=...) -> Tuple[Connection, Connection]: ...
+def Pipe(duplex=...) -> tuple[Connection, Connection]: ...

stdlib/@python2/multiprocessing/pool.pyi

@@ -1,4 +1,4 @@
-from typing import Any, Callable, Dict, Iterable, Iterator, List
+from typing import Any, Callable, Iterable, Iterator
 
 class AsyncResult:
     def get(self, timeout: float | None = ...) -> Any: ...
@@ -20,15 +20,15 @@ class Pool(object):
         initargs: Iterable[Any] = ...,
         maxtasksperchild: int | None = ...,
     ) -> None: ...
-    def apply(self, func: Callable[..., Any], args: Iterable[Any] = ..., kwds: Dict[str, Any] = ...) -> Any: ...
+    def apply(self, func: Callable[..., Any], args: Iterable[Any] = ..., kwds: dict[str, Any] = ...) -> Any: ...
     def apply_async(
         self,
         func: Callable[..., Any],
         args: Iterable[Any] = ...,
-        kwds: Dict[str, Any] = ...,
+        kwds: dict[str, Any] = ...,
         callback: Callable[..., None] | None = ...,
     ) -> AsyncResult: ...
-    def map(self, func: Callable[..., Any], iterable: Iterable[Any] = ..., chunksize: int | None = ...) -> List[Any]: ...
+    def map(self, func: Callable[..., Any], iterable: Iterable[Any] = ..., chunksize: int | None = ...) -> list[Any]: ...
     def map_async(
         self,
         func: Callable[..., Any],