<!DOCTYPE html>
<meta charset="utf-8">
<title>Tests the line-gap-override descriptor of @font-face</title>
<style>
.target {
  position: absolute;
  font-size: 20px;
  top: 10px;
  left: 10px;
  width: 60px;
  height: 30px;
}

.character {
  display: inline-block;
  background-color: green;
  width: 1em;  /* Same as an 'X' in Ahem */
  height: 1em; /* Same as an 'X' in Ahem */
  position: absolute;
}

</style>
<div class="target">
  <span class="character" style="top: 0.5em; left: 0"></span>
  <span class="character" style="top: 2.5em; left: 0"></span>
</div>