PEP8 fixes for tests

tests/test_framing.py

@@ -34,16 +34,17 @@ def test_main(data):
     decoded = framing.decode(encoded)
     assert bytearray(decoded) == data
 
+
 def test_fail():
     encoded = list(framing.encode(''))
     encoded[-1] = not encoded[-1]
     with pytest.raises(ValueError):
         list(framing.decode(encoded))
 
+
 def test_missing():
     f = framing.Framer()
     with pytest.raises(ValueError):
         list(f.decode(b'\x00'))
     with pytest.raises(ValueError):
         list(f.decode(b'\x01\x02\x03\x04'))
-