setAttribute перенос строки

var x = "hello"; 
var y = "world"; 
 
document.querySelector("span").setAttribute("data-tooltip", x+"  "+y);

[data-tooltip]:before { 
  visibility: hidden; 
  pointer-events: none; 
} 
 
[data-tooltip]:before { 
  position: absolute; 
  margin-top: 22px; 
  margin-left: 22px; 
  width: 160px; 
  background-color: #000; 
  color: #fff; 
  content: attr(data-tooltip) '\A' attr(data-tooltip); 
  white-space: pre-wrap; 
} 
 
[data-tooltip]:hover:before { 
  visibility: visible; 
}

<span class="asd">123</span>

var x = "hello"; 
var y = "world"; 
 
document.querySelector("span").setAttribute("data-tooltip", x+"\n"+y);

<span class="asd">123</span>

document.querySelector("span").setAttribute("data-tooltip", "Количество \n Очков");

<span class="asd">123</span>