function lastNonWhitespace () {
    var p = chars.length - 1;

    while (p >= 0) {
      var pp = chars[p];
      if (!isWhiteSpace(pp)) {
        return pp;
      }
      p--;
    }

    return '';
  }
function lastNonWhitespace () {
    var p = chars.length - 1;

    while (p >= 0) {
      var pp = chars[p];
      if (!isWhiteSpace(pp)) {
        return pp;
      }
      p--;
    }

    return '';
  }
function lastNonWhitespace ( ) { var p = chars . length - 1 ; while ( p >= 0 ) { var pp = chars [ p ] ; if ( ! isWhiteSpace ( pp ) ) { return pp ; } p -- ; } return '' ; }
get the last parsed non-whitespace character
get the last parsed non - whitespace character