Update test_smoke.py

Author: stuck-inadream

tests/test_smoke.py

@@ -1,11 +1,10 @@
 import importlib.util
 import pathlib
 
-
 def test_readme_exists():
     assert (pathlib.Path(__file__).parents[1] / "README.md").exists()
 
-
 def test_demo_imports():
+    # Should import without importing gradio (UI import is lazy)
     spec = importlib.util.find_spec("gradio_demo")
     assert spec is not None