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)