old_contents: # (c) 2016, Ansible, Inc
  #
  # This file is part of Ansible
  #
  # Ansible is free software: you can redistribute it and/or modify
  # it under the terms of the GNU General Public License as published by
  # the Free Software Foundation, either version 3 of the License, or
  # (at your option) any later version.
  #
  # Ansible is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
  
  __metaclass__ = type
  
  def issubset(a, b):
      return set(a) <= set(b)
  
  def issuperset(a, b):
      return set(a) >= set(b)
  
  class TestModule(object):
      ''' Ansible math jinja2 tests '''
  
      def tests(self):
          return {
              # set theory
              'issubset': issubset,
              'issuperset': issuperset,
          }
  
new_contents: # (c) 2016, Ansible, Inc
  #
  # This file is part of Ansible
  #
  # Ansible is free software: you can redistribute it and/or modify
  # it under the terms of the GNU General Public License as published by
  # the Free Software Foundation, either version 3 of the License, or
  # (at your option) any later version.
  #
  # Ansible is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
  
  __metaclass__ = type
  from __future__ import (absolute_import, division, print_function)
  
  def issubset(a, b):
      return set(a) <= set(b)
  
  def issuperset(a, b):
      return set(a) >= set(b)
  
  class TestModule:
      ''' Ansible math jinja2 tests '''
  
      def tests(self):
          return {
              # set theory
              'issubset': issubset,
              'issuperset': issuperset,
          }
  
subject: Add python3 compat boilerplate