Translations:Plugin:Tipper/19/en

If a substitution's value results in no text (or nothing but spaces, tabs, newlines, and carriage returns), the whole item containing that substitution will not be displayed. If there is an error during the substitution process (e. g., a substitution name that does not exist, an odd number of % symbols, etc) then the value of that substitution will be "*". Note that you can use double-percent ("%%") in plain text (not in substitutions) if you want an actual percent symbol.