Join () () ()
The triple join block is a reporter block and an operators block that acts like the vanilla join block, but with three instead of two values.
Variants
The Operators Expansion extension has multiple versions of this block with up to 9 inputs instead.
Workaround
This block and its variants can be worked around by using multiple join blocks:
define join (string 1) (string 2) (string 3) return (join (join (string 1) (string 2)) (string 3))::custom cap