MediaWiki:Wikieditor-toolbar-help-content-signature-result
From The Data Science Design Manual Wikia
<a href='#' title='$1:Username'>Username</a> (<a href='#' title='$2:Username'>talk</a>)
<a href='#' title='$1:Username'>Username</a> (<a href='#' title='$2:Username'>talk</a>)