html {
  line-height: 1.5;
}

span {
  background-color: red;
}

.col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

<pre>
<div class="col">
  <span>line 1</span>
  <span>line 2</span>
</div>
</pre>