https://bugs.python.org/issue1462485


import contextlib

@contextlib.contextmanager
def foo():
    yield

class StartIrritation(StopIteration):
    pass


with foo():
    raise StartIrritation

This is the output:

```
Traceback (most recent call last):
  File "/home/graingert/projects/close.py", line 5, in foo
    yield
  File "/home/graingert/projects/close.py", line 12, in <module>
    raise StartIrritation
__main__.StartIrritation

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/graingert/projects/close.py", line 11, in <module>
    with foo():
  File "/usr/lib/python3.10/contextlib.py", line 151, in __exit__
    self.gen.throw(type, value, traceback)
RuntimeError: generator raised StopIteration
```


Note that this was fixed in @contextlib.asynccontextmanager
```
import asyncio
import contextlib

@contextlib.asynccontextmanager
async def foo():
    yield

class StartIrritation(StopIteration):
    pass


async def amain():
    try:
        async with foo():
            raise StartIrritation
    except StartIrritation:
        print("good")
    except RuntimeError:
        print("bad")

asyncio.run(amain())
```

New changeset 7f1c330da31c54e028dceaf3610877914c2a4497 by Thomas Grainger in branch 'main':
bpo-44566: resolve differences between asynccontextmanager and contextmanager (#27024)
https://github.com/python/cpython/commit/7f1c330da31c54e028dceaf3610877914c2a4497

New changeset 68b4690b010d0006e9b0235903afd367191f3c51 by Miss Islington (bot) in branch '3.10':
bpo-44566: resolve differences between asynccontextmanager and contextmanager (GH-27024) (#27266)
https://github.com/python/cpython/commit/68b4690b010d0006e9b0235903afd367191f3c51

New changeset 1c5c9c89ffc36875afaf4c3cc6a716d4bd089bbf by Łukasz Langa in branch '3.9':
[3.9] bpo-44566: resolve differences between asynccontextmanager and contextmanager (GH-27024). (#27269)
https://github.com/python/cpython/commit/1c5c9c89ffc36875afaf4c3cc6a716d4bd089bbf

Thanks! ✨ 🍰 ✨