old_contents: # -*- coding: utf-8 -*-
  
  # standard library
  import collections
  
  # django
  from django.utils.translation import ugettext_lazy as _
  
  ParameterDefinition = collections.namedtuple(
      'Parameter',
      [
          'name',
          'default',
          'kind',
          'verbose_name',
      ]
  )
  
  
  class ParameterDefinitionList(object):
      definitions = [
          ParameterDefinition(
              name='DEFAULT_PROTOCOL',
              default='https',
              kind='str',
              verbose_name=_('default protocol: https'),
          ),
      ]
  
      choices = tuple((x.name, x.verbose_name) for x in definitions)
  
new_contents: # -*- coding: utf-8 -*-
  
  # standard library
  import collections
  
  # django
  from django.utils.translation import ugettext_lazy as _
  
  ParameterDefinition = collections.namedtuple(
      'Parameter',
      [
          'name',
          'default',
          'kind',
          'verbose_name',
      ]
  )
  
  
  class ParameterDefinitionList(object):
      definitions = [
          ParameterDefinition(
              name='DEFAULT_URL_PROTOCOL',
              default='https',
              kind='str',
              verbose_name=_('Default url protocol'),
          ),
      ]
  
      choices = tuple((x.name, x.verbose_name) for x in definitions)
  
subject: Rename parameter DEFAULT_PROTOCOL to DEFAULT_URL_PROTOCOL