text: //Run this only on BabelJS REPL - https://babeljs.io/repl/
  function priceFilter(s, ...v) {
    //Bump up discount
    return s[0] + (v[0] + 5);
  }
  let default_discount = 20;
  let greeting = priceFilter`Your purchase has a discount of
  ${default_discount} percent`;
  console.log(greeting); //Your purchase has a discount of 25
  