Fix logging of the vLLM Config (vllm-project#11143) (#325)

Co-authored-by: Jeremy Arnold <[email protected]>

vllm/engine/llm_engine.py

@@ -247,7 +247,7 @@ def __init__(
         )
 
         logger.info(
-            "Initializing an LLM engine (v%s) with config: %r,"
+            "Initializing an LLM engine (v%s) with config: %s, "
             "use_cached_outputs=%s, ",
             VLLM_VERSION,
             vllm_config,