OffsetPosition.lineContents fails when the last character is a newline

[justinp]

Like the description says... it throws a java.lang.StringIndexOutOfBoundsException: String index out of range: -1 because it assumes that the last character is not a newline. Here's a small test program demonstrating the bug:

object Bug extends scala.util.parsing.combinator.RegexParsers {
  override def skipWhitespace = false

  val whitespace: Parser[String] = "\\s+".r
  val anything = elem('a')

  val line = log(whitespace <~ anything)("line")

  def main(args: Array[String]): Unit = {
    println(parse(line, "\n"))
  }
}

[SethTisue]

fixed by #129