:sig String join(StringList l, String delim = "\n") :params l : list of strings to be joined delim : delimiter (defaults to newline character) return value : a string containing items joined by 'delim' :see >string :content Joins all strings in `l` into a single `String`. The delimiter is inserted between items. If `delim` is omitted, the default separator is a newline character. :example StringList parts = split("a,b,c", ","); print(join(parts, "-"), "\n");