{% load i18n %}
<dl class="comments-list">
  {% for comment in comment_list %}
    <dt id="c{{ comment.id }}">{% if comment.user.is_staff %}<span class="moderator">{% trans "Moderator" %}</span>{% endif %}
    {% blocktrans with date=comment.submit_date name=comment.name %}On {{ date }}, {{ name }} wrote:{% endblocktrans %}</dt>
    <dd{% if comment.user.is_staff %} class="moderator"{% endif %}>
        {% if comment.user.is_staff %}
            <p>{{ comment.comment }}</p>
        {% else %}
            {% if comment.comment != comment.comment|truncatewords:20 %}
                <p id="comment-{{ comment.id }}">{{ comment.comment|truncatewords:20 }}
                    <a href="#comment-{{ comment.id }}-full" class="toggle hideparent">{% trans "Read all" %}</a></p>
                <p style="display:none" id="comment-{{ comment.id }}-full">{{ comment.comment }}</p>
            {% else %}
                <p>{{ comment.comment }}</p>
            {% endif %}
        {% endif %}
    </dd>
  {% endfor %}
</dl>

{% load i18n %}
<dl class="comments-list">
  {% for comment in comment_list %}
    <dt id="c{{ comment.id }}">{% if comment.user.is_staff %}<span class="moderator">{% trans "Moderator" %}</span>{% endif %}
    {% blocktrans with date=comment.submit_date name=comment.name %}On {{ date }}, {{ name }} wrote:{% endblocktrans %}</dt>
    <dd{% if comment.user.is_staff %} class="moderator"{% endif %}>
        {% if comment.user.is_staff %}
            <p>{{ comment.comment|linebreaksbr }}</p>
        {% else %}
            {% if comment.comment != comment.comment|truncatewords:20 %}
                <p id="comment-{{ comment.id }}">{{ comment.comment|truncatewords:20 }}
                    <a href="#comment-{{ comment.id }}-full" class="toggle hideparent">{% trans "Read all" %}</a></p>
                <p style="display:none" id="comment-{{ comment.id }}-full">{{ comment.comment|linebreaksbr }}</p>
            {% else %}
                <p>{{ comment.comment|linebreaksbr }}</p>
            {% endif %}
        {% endif %}
    </dd>
  {% endfor %}
</dl>

Add line breaks to comments via template filter
Add line breaks to comments via template filter