Plantilya:Used in system

This plantilya is used in system messages.
Changes to it can cause immediate changes to the Wikipedia user interface. To avoid large-scale disruption, any changes should first be tested in this plantilya's /sandbox or /testcases subpage, or in your own user space. The tested changes can then be added in one single edit to this plantilya. Please discuss any changes on the talk page before implementing them.

Lua error in Module:Documentation at line 144: message: type error in message cfg.container (string expected, got nil).