asyncio: mark positional-only args (#3934)

stdlib/3/asyncio/futures.pyi

@@ -52,9 +52,9 @@ class Future(Awaitable[_T], Iterable[_T]):
     def done(self) -> bool: ...
     def result(self) -> _T: ...
     def exception(self) -> Optional[BaseException]: ...
-    def remove_done_callback(self: _S, fn: Callable[[_S], Any]) -> int: ...
-    def set_result(self, result: _T) -> None: ...
-    def set_exception(self, exception: Union[type, BaseException]) -> None: ...
+    def remove_done_callback(self: _S, __fn: Callable[[_S], Any]) -> int: ...
+    def set_result(self, __result: _T) -> None: ...
+    def set_exception(self, __exception: Union[type, BaseException]) -> None: ...
     def _copy_state(self, other: Any) -> None: ...
     def __iter__(self) -> Generator[Any, None, _T]: ...
     def __await__(self) -> Generator[Any, None, _T]: ...

stdlib/3/asyncio/tasks.pyi

@@ -110,7 +110,7 @@ class Task(Future[_T], Generic[_T]):
     if sys.version_info >= (3, 8):
         def get_coro(self) -> Any: ...
         def get_name(self) -> str: ...
-        def set_name(self, value: object) -> None: ...
+        def set_name(self, __value: object) -> None: ...
     def get_stack(self, *, limit: int = ...) -> List[FrameType]: ...
     def print_stack(self, *, limit: int = ..., file: TextIO = ...) -> None: ...
     def cancel(self) -> bool: ...

tests/stubtest_whitelists/py38.txt

@@ -9,14 +9,7 @@ asyncio.AbstractEventLoop.sock_sendfile
 asyncio.Future.__init__
 asyncio.Future._callbacks
 asyncio.Future._schedule_callbacks
-asyncio.Future.remove_done_callback
-asyncio.Future.set_exception
-asyncio.Future.set_result
 asyncio.Handle.__init__
-asyncio.Task.remove_done_callback
-asyncio.Task.set_exception
-asyncio.Task.set_name
-asyncio.Task.set_result
 asyncio.TimerHandle.__init__
 asyncio.events.AbstractEventLoop.sock_sendfile
 asyncio.events.Handle.__init__
@@ -24,14 +17,7 @@ asyncio.events.TimerHandle.__init__
 asyncio.futures.Future.__init__
 asyncio.futures.Future._callbacks
 asyncio.futures.Future._schedule_callbacks
-asyncio.futures.Future.remove_done_callback
-asyncio.futures.Future.set_exception
-asyncio.futures.Future.set_result
 asyncio.proactor_events._ProactorBasePipeTransport.__del__
-asyncio.tasks.Task.remove_done_callback
-asyncio.tasks.Task.set_exception
-asyncio.tasks.Task.set_name
-asyncio.tasks.Task.set_result
 bdb.Bdb.runcall
 builtins.bytearray.extend
 builtins.bytearray.pop