Adhere to PEP 263 for source encoding

See https://www.python.org/dev/peps/pep-0263/ for details.

Author: tovrstra

bagit.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# encoding: utf-8
+# -*- coding: utf-8 -*-
 
 from __future__ import absolute_import, division, print_function, unicode_literals