Same problem here: https://github.com/mozilla/kitsune/blob/master/apps/users/forms.py#L321

Probably should go through each of these and fix/refactor:

```
(kitsune)[rlr (ba94e46...) kitsune]$ git grep email_utils.render_email
apps/users/forms.py:                email_utils.render_email(text_template, context),
apps/users/forms.py:                    email_utils.render_email(
apps/users/models.py:                email_utils.render_email(text_template, email_kwargs),
apps/users/models.py:                    email_utils.render_email(
apps/users/views.py:                    message = email_utils.render_email(
apps/wiki/events.py:                email_utils.render_email(text_template, c),
apps/wiki/events.py:                    email_utils.render_email(html_template, c), 'text/html')
apps/wiki/tasks.py:        msg = email_utils.render_email(template, c)
apps/wiki/tasks.py:        msg = email_utils.render_email(template, c)
```