.clean-text
  = form_for @resource do |f|
    = f.fields_for :roles, dynamic: true do |rf|
      clean text

    = f.add_fields_link :roles, 'Add role'

.clean-text-with-remove-link
  = form_for @resource do |f|
    = f.fields_for :roles, dynamic: true do |rf|
      clean text
      = rf.remove_fields_link 'Remove role'

    = f.add_fields_link :roles, 'Add role'