add .isort.cfg (#378)

test/lang/test_tracing.py

@@ -1,10 +1,9 @@
 import unittest
 
+import sglang as sgl
 from sglang.backend.base_backend import BaseBackend
 from sglang.lang.chat_template import get_chat_template
 
-import sglang as sgl
-
 
 class TestTracing(unittest.TestCase):
     def test_few_shot_qa(self):
@@ -111,7 +110,7 @@ class TestTracing(unittest.TestCase):
             forks = s.fork(3)
             for i in range(3):
                 forks[i] += f"Now, expand tip {i+1} into a paragraph:\n"
-                forks[i] += sgl.gen(f"detailed_tip")
+                forks[i] += sgl.gen("detailed_tip")
 
             s += "Tip 1:" + forks[0]["detailed_tip"] + "\n"
             s += "Tip 2:" + forks[1]["detailed_tip"] + "\n"