fix

Signed-off-by: johnnynunez <johnnynuca14@gmail.com>

Author: johnnynunez

vllm/model_executor/guided_decoding/__init__.py

@@ -25,7 +25,7 @@ def maybe_backend_fallback(
 
     def fallback_or_error(guided_params: GuidedDecodingParams, message: str,
                           fallback: str) -> None:
-        """Change the backend to the specified fallback with a warning log, 
+        """Change the backend to the specified fallback with a warning log,
         or raise a ValueError if the `no-fallback` option is specified."""
         if guided_params.no_fallback():
             raise ValueError(message)
@@ -52,6 +52,7 @@ def fallback_or_error(guided_params: GuidedDecodingParams, message: str,
     if guided_params.backend_name == "xgrammar":
         from vllm.model_executor.guided_decoding.xgrammar_decoding import (
             xgr_installed)
+
         # xgrammar doesn't support regex, fallback to outlines
         if guided_params.regex is not None:
             fallback_or_error(
@@ -158,4 +159,4 @@ def get_local_guided_decoding_logits_processor(
 
     raise ValueError(
         f"Unknown guided decoding backend '{guided_params.backend}'. "
-        "Must be one of 'outlines, 'lm-format-enforcer', 'xgrammar'")
+        "Must be one of 'outlines, 'lm-format-enforcer', 'xgrammar'")