Update packages.py

src/llamafactory/extras/packages.py

@@ -82,6 +82,7 @@ def is_vllm_available():
 def is_vllm_version_greater_than_0_5():
     return _get_package_version("vllm") >= version.parse("0.5.0")
 
+
 @lru_cache
 def is_vllm_version_greater_than_0_5_1():
-    return _get_package_version("vllm") >= version.parse("0.5.1")
+    return _get_package_version("vllm") >= version.parse("0.5.1")