text: Title: AttributeError: 'tuple' object has no attribute 'expandtabs'
  Body: I'm getting the following error when running `python -m gpt_engineer.main`. I'm using python 3.11/
  
  ```
    File "/opt/miniconda3/envs/gpt-eng/lib/python3.11/inspect.py", line 873, in cleandoc
      lines = doc.expandtabs().split('\n')
              ^^^^^^^^^^^^^^
  
  AttributeError: 'tuple' object has no attribute 'expandtabs'
  ```