Please note that any line starting with whitespace triggers preformatting (no word wrap), so it's generally more complicated to paste code here than to use a site like Pastebin.

That said, if you have a short snippet you don't mind cleaning up by hand, you can use a text editor to globally replace the opening angle brackets with the HTML entity:

Find: <

Replace with: &lt;

You can escape '<' and '>' as &lt; and &gt;. You can also enclose the HTML code within <pre><nowiki>....</nowiki></pre> tags.

Thanks to both of you for your answers!

This is not quite user-friendly for new users. Can someone ask SUMO folks, if they can add a code toolbar icon ? (Not for being lazy, but other users might not know about <nowiki>.)

See:

• https://support.mozilla.org/en-US/kb/markup-chart