a list of symbols to be joined together. symbol to be produced. in the case of an empty list, this will be the empty symbol. if there is more than one input element, each non-last element will be followed by a separator before continuing with the next element. beware of empty symbols (because of pd's lack of provisions for handling them properly). single-byte symbol used as separator. unlike for [gf/s2l], this can be any length. (default: single space)