The |non filter [1] (since SPIP 2.0) returns either nothing at all or a space.
It is equivalent to |?{'',' '} or |?{''}, and it is used to return empty content to indicate that the optional parts of the tag should NOT be displayed.
Examples:[(#TITRE|strlen|>{30}|non) This title is a short one][(#EMAIL|non) #FORMULAIRE_SAISIE_EMAIL ]
voir aussi le filtre |oui