fix tests

Author: JelleZijlstra

test-data/unit/check-async-await.test

@@ -425,7 +425,7 @@ async def g() -> AsyncGenerator[int, None]:
     reveal_type(value)  # E: Revealed type is 'builtins.int*'
     yield value
 
-    yield 'not an int'
+    yield 'not an int'  # E: Incompatible types in yield (actual type "str", expected type "int")
     # return without a value is fine
     return
 reveal_type(g)  # E: Revealed type is 'def () -> typing.AsyncGenerator[builtins.int, void]'
@@ -444,7 +444,7 @@ from typing import AsyncIterator
 async def gen() -> AsyncIterator[int]:
     yield 3
 
-    yield 'not an int'
+    yield 'not an int'  # E: Incompatible types in yield (actual type "str", expected type "int")
 
 async def use_gen() -> None:
     async for item in gen():
@@ -543,18 +543,18 @@ from typing import AsyncGenerator
 
 async def return_int() -> AsyncGenerator[int, None]:
     yield 1
-    return 42  # E: No return value expected
+    return 42  # E: 'return' with value in async generator is not allowed
 
 async def return_none() -> AsyncGenerator[int, None]:
     yield 1
-    return None
+    return None  # E: 'return' with value in async generator is not allowed
 
 def f() -> None:
     return
 
 async def return_f() -> AsyncGenerator[int, None]:
     yield 1
-    return f()
+    return f()  # E: 'return' with value in async generator is not allowed
 
 [builtins fixtures/dict.pyi]