Apparently the board for the R language uses a composer placeholder that helpfully includes an example of a
``` code fence. This would also be a helpful hint for our language board, but I couldn’t figure out how they’re doing it. I tried putting literal newlines,
<br /> into the
js.composer.reply_placeholder but none actually spat out a newline.
What’s the magic that I’m missing here? Are they using a custom theme for this? How can we
steal be inspired by this great idea for ourselves?