invokes <code>pp</code> and tells it to <code>-import</code> the contents of <code>Highlight.pp</code> (so that the macros herein defined are loaded in the current environment) and then process the file <code>example.md</code>. Since PP outputs to <code>STDOUT</code>, we redirect (<code>&gt;</code>) its output to <code>example-preprocessed.md</code>.</p>
<p>If you open <code>example-preprocessed.md</code> in a text editor you’ll see how the macros inside <code>example.md</code> were expanded.</p>
<p>The s