<!DOCTYPE html>
<style>
:root {
border-collapse: collapse;
border-spacing: 1px;
}
.cell {
display: table-cell;
border: solid black;
.pre {
white-space: pre;
border: solid blue;
</style>
<span class="pre"> <span class="cell">A</span>
<span class="cell">B</span> </span>