bug: python highlighting borked sometimes (parameter interpreted as function) #757

Description of the bug

Here is the markdown:

```python
def __exit__(self, exc_type, exc_value, traceback) -> None:
    """
    Automatic breakpoint removal.
    """
    self.remove()
```

```python
__exit__(exc_type, exc_value, traceback) -> None
```

::: pwndbg.dbg.StopPoint.__exit__

It renders like this:

The exc_type parameter shouldn't be highlighted. It is wrongly marked as nf by pygments which is for functions.

To Reproduce

git clone https://github.com/k4lizen/pwndbg
cd pwndbg
git checkout weird-high
uv run --group docs mkdocs serve --strict

Look at http://127.0.0.1:8000/pwndbg/setup/

Expected behavior

The exc_type parameter shouldn't be highlighted. It is wrongly marked as nf by pygments which is for functions.

Environment information

- __System__: Linux-6.13.7-artix1-1-x86_64-with-glibc2.41
- __Python__: cpython 3.13.2 (/path/pwndbg/.venv/bin/python3)
- __Environment variables__:
- __Installed packages__:
  - `mkdocstrings` v0.29.1