Kane York 789e3775df
FIX: Make all email subject vars available in notification subjects (#11064)
A site owner attempting to use both the email_subject site setting and translation overrides for normal post notification
email subjects would find themselves frusturated at the lack of template argument parity.
Make all the variables available for translation overrides by adding the subject variables to the custom interpolation keys list and applying them.

Reported at https://meta.discourse.org/t/customize-subject-format-for-standard-emails/20801/47?u=riking
2020-11-02 20:00:11 -08:00
..
2019-10-16 14:28:04 -04:00
2019-10-16 14:28:04 -04:00