fix spacing before sharing buttons

apps/pep_theme/templates/blog/blog_post_detail.html

@@ -81,6 +81,7 @@
 {% endblock %}
 
 {% block blog_post_detail_sharebuttons %}
+<br>
 {% set_short_url_for blog_post %}
 <a class="btn btn-sm share-twitter" target="_blank" href="https://twitter.com/intent/tweet?url={{ blog_post.short_url|urlencode }}&amp;text={{ blog_post.title|urlencode }}">{% trans "Share on Twitter" %}</a>
 <a class="btn btn-sm share-facebook" target="_blank" href="https://www.facebook.com/sharer/sharer.php?u={{ request.build_absolute_uri }}">{% trans "Share on Facebook" %}</a>