Make all function annotations accessible from builtins complete

stdlib/3/builtins.pyi

@@ -48,7 +48,9 @@ class type:
     def __init__(self, o: object) -> None: ...
     @overload
     def __init__(self, name: str, bases: Tuple[type, ...], dict: Dict[str, Any]) -> None: ...
-    @staticmethod
+    @overload
+    def __new__(cls, o: object) -> type: ...
+    @overload
     def __new__(cls, name: str, bases: Tuple[type, ...], namespace: Dict[str, Any]) -> type: ...
 
 class int(SupportsInt, SupportsFloat, SupportsAbs[int]):
@@ -224,10 +226,10 @@ class str(Sequence[str]):
     def zfill(self, width: int) -> str: ...
     @staticmethod
     @overload
-    def maketrans(self, x: Union[Dict[int, Any], Dict[str, Any]]) -> Dict[int, Any]: ...
+    def maketrans(x: Union[Dict[int, Any], Dict[str, Any]]) -> Dict[int, Any]: ...
     @staticmethod
     @overload
-    def maketrans(self, x: str, y: str, z: str = ...) -> Dict[int, Any]: ...
+    def maketrans(x: str, y: str, z: str = ...) -> Dict[int, Any]: ...
 
     def __getitem__(self, i: Union[int, slice]) -> str: ...
     def __add__(self, s: str) -> str: ...
@@ -408,7 +410,7 @@ class bytearray(MutableSequence[int], ByteString):
 
 class memoryview():
     # TODO arg can be any obj supporting the buffer protocol
-    def __init__(self, bytearray) -> None: ...
+    def __init__(self, b: bytearray) -> None: ...
 
 class bool(int, SupportsInt, SupportsFloat):
     def __init__(self, o: object = ...) -> None: ...

stdlib/3/typing.pyi

@@ -21,8 +21,8 @@ no_type_check = object()
 
 class TypeAlias:
     # Class for defining generic aliases for library types.
-    def __init__(self, target_type) -> None: ...
-    def __getitem__(self, typeargs): ...
+    def __init__(self, target_type: type) -> None: ...
+    def __getitem__(self, typeargs: Any) -> Any: ...
 
 Union = TypeAlias(object)
 Optional = TypeAlias(object)
@@ -102,7 +102,7 @@ class Generator(Iterator[_T_co], Generic[_T_co, _T_contra, _V_co]):
     def send(self, value: _T_contra) -> _T_co:...
 
     @abstractmethod
-    def throw(self, typ: BaseException, val: Any=None, tb=None) -> None:...
+    def throw(self, typ: BaseException, val: Any = None, tb: Any = None) -> None:...
 
     @abstractmethod
     def close(self) -> None:...
@@ -284,7 +284,7 @@ class IO(Iterable[AnyStr], Generic[AnyStr]):
     @abstractmethod
     def __enter__(self) -> 'IO[AnyStr]': ...
     @abstractmethod
-    def __exit__(self, type, value, traceback) -> bool: ...
+    def __exit__(self, t: type, value: Any, traceback: Any) -> bool: ...
 
 class BinaryIO(IO[bytes]):
     # TODO readinto