bdb: various fixes (#4127)

stdlib/2and3/bdb.pyi

@@ -23,7 +23,7 @@ class Bdb:
     returnframe: Optional[FrameType]
     stoplineno: int
 
-    def __init__(self, skip: Iterable[str] = ...) -> None: ...
+    def __init__(self, skip: Optional[Iterable[str]] = ...) -> None: ...
     def canonic(self, filename: str) -> str: ...
     def reset(self) -> None: ...
     def trace_dispatch(self, frame: FrameType, event: str, arg: Any) -> _TraceDispatch: ...
@@ -64,7 +64,7 @@ class Bdb:
     ) -> None: ...
     def runeval(self, expr: str, globals: Optional[Dict[str, Any]] = ..., locals: Optional[Mapping[str, Any]] = ...) -> None: ...
     def runctx(self, cmd: Union[str, CodeType], globals: Optional[Dict[str, Any]], locals: Optional[Mapping[str, Any]]) -> None: ...
-    def runcall(self, func: Callable[..., _T], *args: Any, **kwds: Any) -> Optional[_T]: ...
+    def runcall(self, __func: Callable[..., _T], *args: Any, **kwds: Any) -> Optional[_T]: ...
 
 class Breakpoint:
 

tests/stubtest_whitelists/py39.txt

@@ -28,7 +28,6 @@ asyncio.futures.Future._callbacks
 asyncio.futures.Future.cancel
 asyncio.proactor_events._ProactorBasePipeTransport.__del__
 asyncio.tasks.Task.cancel
-bdb.Bdb.runcall
 builtins.bytearray.extend
 builtins.bytearray.pop
 builtins.compile

tests/stubtest_whitelists/py3_common.txt

@@ -30,7 +30,6 @@ asyncio.selector_events.BaseSelectorEventLoop.sock_recv
 asyncio.streams.FlowControlMixin.__init__
 asyncio.tasks.Task.get_stack
 asyncio.tasks.Task.print_stack
-bdb.Bdb.__init__
 builtins.bytearray.__float__
 builtins.bytearray.__int__
 builtins.bytearray.append