don't use bool in typing-full.pyi

Author: JelleZijlstra

test-data/unit/check-default-plugin.test

@@ -30,5 +30,4 @@ from typing import Callable, Iterator
 c: Callable[..., Iterator[int]]
 reveal_type(c) # E: Revealed type is 'def (*Any, **Any) -> typing.Iterator[builtins.int]'
 reveal_type(contextmanager(c)) # E: Revealed type is 'def (*Any, **Any) -> contextlib.GeneratorContextManager[builtins.int*]'
-[builtins fixtures/async_await.pyi]
 [typing fixtures/typing-full.pyi]

test-data/unit/fixtures/typing-full.pyi

@@ -140,6 +140,7 @@ def runtime(cls: T) -> T:
 
 class ContextManager(Generic[T]):
     def __enter__(self) -> T: pass
-    def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> Optional[bool]: pass
+    # Use Any because not all the precise types are in the fixtures.
+    def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> Any: pass
 
 TYPE_CHECKING = 1