text: Title: Arrow keys no longer work in PDB with tox 4
  Body: Add `--pdb` to a `pytest` call (with or without `{tty:--color=yes}`), or insert a `pytest.set_trace()` or `breakpoint()` call.
  The up arrow cannot be used to access previous commands in `tox>=4`:
  ``` 
  (Pdb) pp value
  '{}'
  (Pdb) ^[[A
  ```
  In `tox<4` the second prompt would show `(Pdb) pp value`.