{% if include.post.categories %}
<span> {% if include.post.categories.size == 1 %} <a href="{{ include.post.categories.first | category_url }}">{{ include.post.categories.first | capitalize }}.</a> {% else %} {% assign penultimate = include.post.categories.size | minus: 2 %} {% for i in (0..penultimate) %} {% if include.post.categories.size == 2 %} <a href="{{ include.post.categories[i] | category_url }}">{{ include.post.categories[i] | capitalize }}</a> {% else %} <a href="{{ include.post.categories[i] | category_url }}">{{ include.post.categories[i] | capitalize }},</a> {% endif %} {% endfor %} and <a href="{{ include.post.categories.last | category_url }}">{{ include.post.categories.last | capitalize }}.</a> {% endif %} </span>
{% endif %}