mark deque.rotate arg as having a default (#4386)

Author: NorthIsUp

stdlib/2/collections.pyi

@@ -57,7 +57,7 @@ class deque(Sized, Iterable[_T], Reversible[_T], Generic[_T]):
     def popleft(self) -> _T: ...
     def remove(self, value: _T) -> None: ...
     def reverse(self) -> None: ...
-    def rotate(self, n: int) -> None: ...
+    def rotate(self, n: int = ...) -> None: ...
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[_T]: ...
     def __str__(self) -> str: ...

stdlib/3/collections/__init__.pyi

@@ -216,7 +216,7 @@ class deque(MutableSequence[_T], Generic[_T]):
     def popleft(self) -> _T: ...
     def remove(self, value: _T) -> None: ...
     def reverse(self) -> None: ...
-    def rotate(self, n: int) -> None: ...
+    def rotate(self, n: int = ...) -> None: ...
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[_T]: ...
     def __str__(self) -> str: ...