/proc/jointext(/list/List, Glue, Start, End)
Arguments:
List (/list): The list of elements to join up.
Glue: The text to be inserted between elements.
Start = 1: The index in the list to start at.
End = 0: The index after the final element to join.
Returns:
text: A string of the elements in List, joined together by the Glue.

All items in the list are stringified - similar to running "[element]" over each element.

    world.log << jointext(list(1, "waaa", 'icons.dmi'), ",") // "1,waaa,icons.dmi"

Negative amounts for the Start or End value count from the end of the list.

This functions similarly to /list/proc/Join().