Merge branch 'features/refactor/base' into features/refactor/multimodal_support

Author: markurtz

src/guidellm/backends/openai.py

@@ -228,7 +228,7 @@ async def resolve(
             raise RuntimeError("Backend not started up for process.")
 
         if history is not None:
-            raise NotImplementedError("Multi-turn requests  not yet supported")
+            raise NotImplementedError("Multi-turn requests not yet supported")
 
         response_handler = self._resolve_response_handler(
             request_type=request.request_type