fix linting

vision_agent/agent/agent_coder.py

@@ -67,7 +67,7 @@ def parse_file_name(s: str) -> str:
  return "".join([p for p in s.split(" ") if p.endswith(".png")])
 
 
-def write_program(question: str, feedback: str, model: LLM, image: Optional[Union[str, Path]]=None) -> str:
+def write_program(question: str, feedback: str, model: LLM, image: Optional[Union[str, Path]] = None) -> str:
  prompt = PROGRAM.format(
  docstring=TOOL_DOCSTRING, question=question, feedback=feedback
  )