sepBy1
infix fun <I : Any, O, S, U : Any> Parser<I, O, U>.sepBy1(separator: Parser<I, S, U>): Parser<I, List<O>, U>
Parses one or more occurrences of this parser separated by separator, collecting item values (not separators) into a non-empty List.
Sugar for pSepBy1: item sepBy1 sep is equivalent to pSepBy1(item, sep).