text: console.log(html`<b>${process.argv[2]} says</b>: "${process.argv[3]}"`);
  
  function html(pieces, ...substitutions) {
      substitutions = substitutions.map(escape);
  
      var result = pieces[0];
      for (var i = 0; i < substitutions.length; ++i) {
          result += substitutions[i] + pieces[i + 1];
      }
  
      return result;
  }
  
  function escape(s) {
      return s.replace(/&/g, "&amp;")
              .replace(/</g, "&lt;")
              .replace(/>/g, "&gt;")
              .replace(/'/g, "&#39;")
              .replace(/"/g, "&quot;");
  }
  