Tokens are sequences of printable ASCII characters delimited by white space, except that `(', `)', `[', `]', `{', `}', and `,' are always considered as single character tokens unless backquoted.
Single line comments are started by one of *** or --, and ended by the end of line. Multiline comments are started by ***( and ended by ). Parentheses (whether backquoted or not) must balance within multiline comments.