code: func (t TokenType) String() string {
  	switch t {
  	case ILLEGAL:
  		return "ILLEGAL"
  	case EOF:
  		return "EOF"
  	case EOL:
  		return "EOL"
  	case WHITESPACE:
  		return "WHITESPACE"
  	case COMMENT:
  		return "COMMENT"
  	case SEPARATOR:
  		return "SEPARATOR"
  	case NEGATION:
  		return "NEGATION"
  	case PATTERN:
  		return "PATTERN"
  	case ANY:
  		return "ANY"
  	default:
  		return "BAD TOKEN"
  	}
  }
docs: // String returns a string representation of the Token type.