Issue #3586102: Normalize mail Content-Type charset in NotificationTest (core #3555537) (4.x backport) (!60) · Merge requests · project / purge_users

Backport of MR !59 to the 4.x branch.

Fixes 8 NotificationTest failures on the "next minor" core matrix, caused by core #3555537 lowering the charset token to utf-8.

Issue #3586102: Normalize mail Content-Type charset in NotificationTest (core #3555537) (4.x backport)