<pre id="um">
Linha 1
  Linha 2
    Linha 3
</pre>

<pre id="dois">
Linha 1
  Linha 2
    Linha 3
</pre>
pre#um {
  tab-size: 4;
}

pre#dois {
  tab-size: 1.5em;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.