Added a period to "Notification-header-reverted".
Added a period to "Notification-header-reverted".

Bug: T142917
Change-Id: I38679de5e3fe1142b6b1660c747a573670f16643

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo