message: Fix flake8 and add copyright
diff: +# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
  +# Spack Project Developers. See the top-level COPYRIGHT file for details.
  +#
  +# SPDX-License-Identifier: (Apache-2.0 OR MIT)
  +
  from spack import *
  +
  class PyShroud(PythonPackage):
  """Create Fortran wrappers for a C++ library."""
  