_includes/letterboxd-link.html
{% if page.review.movie.letterboxd %}
<p class="letterboxd__link">{% include icons/icon-letterboxd.html %}<em>Read this review on <a href="{{ page.review.movie.letterboxd }}" title="Read my review of ‘{{ page.title }}’ on Letterboxd">Letterboxd</a></em></p>
{% endif %}