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179 bytes added ,  09:37, 16 April 2015
add safesubst:
<includeonly>{{safesubst:#invoke:String | sub | s={{{1|}}} | 1 | {{safesubst:#expr: -{{{2|1}}} - 1}} | ignore_errors=true }}</includeonly><noinclude>
{{documentation}}</noinclude>
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