View source for Template:Used in system

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'''This template is used {{#if:{{{1|}}}|{{{1}}}|in system messages}}.''' <br> 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 template's [[{{#ifeq:{{SUBPAGENAME}}|doc| {{SUBJECTSPACE}}:{{BASEPAGENAME}} | {{SUBJECTPAGENAME}} }}/sandbox|/sandbox]] or [[{{#ifeq:{{SUBPAGENAME}}|doc| {{SUBJECTSPACE}}:{{BASEPAGENAME}} | {{SUBJECTPAGENAME}} }}/testcases|/testcases]] subpage, or in your own [[Wikipedia:Subpages#How to create user subpages|user space]]. The tested changes can then be added in one single edit to this template. Please discuss any changes at {{#if:{{{2|}}}|[[{{{2}}}]]|the [[{{#ifeq:{{SUBPAGENAME}}|doc| {{TALKSPACE}}:{{BASEPAGENAME}} | {{TALKPAGENAME}} }}|talk page]]}} before implementing them.
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