  from django.test import TestCase as DjangoTestCase
  from django.test import override_settings
  from django.utils import translation
  
  from . import models
  from .widgetadmin import site as widget_admin_site
  
  
 
</s> remove         return db_field.formfield(**kwargs)
 </s> add         form_field = db_field.formfield(**kwargs)
        if isinstance(form_field.widget, SelectMultiple) and not isinstance(form_field.widget, CheckboxSelectMultiple):
            msg = _('Hold down "Control", or "Command" on a Mac, to select more than one.')
            help_text = form_field.help_text
            form_field.help_text = string_concat(help_text, ' ', msg) if help_text else msg
        return form_field
from django.utils import six
  from django.test import TestCase as DjangoTestCase
  from django.test import override_settings
from django.utils import six
  from django.utils import translation
  
  from . import models
  from .widgetadmin import site as widget_admin_site
  
  
keep add keep keep keep keep keep keep
 Made m2m fields form help_text munging specific to admin widgets.

Refs #9321 and follow-up to e80de93af6a0a21a9063a55c4d6d20e3927243e9. 
tests/admin_widgets/tests.py