fix trailing whitespace

Lib/test/test_xml_etree_c.py

@@ -53,7 +53,6 @@ class TestAliasWorking(unittest.TestCase):
         e = cET_alias.Element('foo')
         self.assertEqual(e.tag, 'foo')
 
-
 @unittest.skipUnless(cET, 'requires _elementtree')
 class TestAcceleratorImported(unittest.TestCase):
     # Test that the C accelerator was imported, as expected