Cleanup: run autopep8 on tests/

tests/python/bl_usd_import_test.py

@@ -10,6 +10,7 @@ import bpy
 
 args = None
 
+
 class AbstractUSDTest(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
@@ -22,6 +23,7 @@ class AbstractUSDTest(unittest.TestCase):
         # Make sure we always start with a known-empty file.
         bpy.ops.wm.open_mainfile(filepath=str(self.testdir / "empty.blend"))
 
+
 class USDImportTest(AbstractUSDTest):
 
     def test_import_prim_hierarchy(self):
@@ -42,6 +44,7 @@ class USDImportTest(AbstractUSDTest):
         self.assertEqual(objects['World'], objects['Empty'].parent)
         self.assertEqual(objects['Empty'], objects['Plane_002'].parent)
 
+
 def main():
     global args
     import argparse