Add superscript in Sublime Text
<p>I inherited a line of code with the following type of superscript:</p>

<pre><code>nm³
</code></pre>

<p>I cannot seem to change - or replicate - the <sup>3</sup> superscript. This particular <sup>3</sup> superscript seems distinct from that which I can create in Text Edit.app, or Microsoft Word (i.e., <sup>3</sup>), because when I paste the superscript I create in one of those into Sublime Text, the superscript is not retained (i.e., it looks just like this: <code>nm3</code>).</p>

<p>In particular, I'd like to change it to <sup>2</sup>. Is there a way to do this with Sublime Text, another text editor, or through a different approach? Why is this superscript different?</p>