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|13:43, 1 December 2016||Siebrand|
|03:41, 23 November 2016||Liuxinyu970226|
|19:04, 22 November 2016||Pikne|
For these two messages there is a warning "Following parameter is unknown: $3" despite documentation suggesting that there should be an optional variable which "can be used for PLURAL". Is the variable really unimplemented or is the warning redundant?
For MediaWiki:Notification-header-user-rights-add-and-remove/sk the docs don't mention optional variables, but apparently it's expected to have similar plural support as first two.