Email subject template instead of hardcoded string #77
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Instead of a direct setting, the email subject can now be set using a template.
This is heavily inspired and pretty much copied from the way Django is rendering the email subject for its password reset links.
See https://github.com/django/django/blob/main/django/contrib/auth/templates/registration/password_reset_subject.txt
See https://docs.djangoproject.com/en/4.2/topics/auth/default/#django.contrib.auth.views.PasswordResetView.subject_template_name
This approach also allows for a i18n email subject, which is not really possible otherwise (gettext translations in settings will likely break email services).