fix style in test_orm.py

Author: kabulov kozim

test/test_orm.py

@@ -5,6 +5,7 @@
 from sqlalchemy.orm import declarative_base, sessionmaker
 from sqlalchemy.testing.fixtures import TablesTest, config
 
+
 class TestDirectories(TablesTest):
     __backend__ = True
 
@@ -34,6 +35,7 @@ def drop_table(self, base, engine):
     def bind_old_method_to_dialect(self, dialect):
         def _fix_variable_name(self, variable):
             return variable
+
         dialect._fix_variable_name = MethodType(_fix_variable_name, dialect)
 
     def test_directories(self):