Remove failing call to before_save on:
Remove failing call to before_save on:

As of Rails 5, before_save ignored on:
silently (https://github.com/rails/rails/issues/17622), meaning that
the hook was called on every save without reporting an error.

With Rails 6 on: now generates an
error (https://github.com/rails/rails/pull/30919) instead of failing silently.

As a result, the email downcase hook has been rewritten to use if: instead.

tomichj/invitation,tomichj/invitation,tomichj/invitation