fix after changing null -> blank

templates/watchlist/movie_detail.html

@@ -14,7 +14,7 @@
     <p>Total score: {{ movie.score }}, seen by: {{ movie.seen_score }}.
     <ul>
         {% for vote in votes %}
-        <li>{{vote.user.username}} {% if vote.seen %}(seen){% endif %} &ndash; {% if vote.vote == 1 %}👍{% elif vote.vote == 0 %}No opinion{% elif vote.vote == -1 %}👎{%endif%}{% if vote.comment is not None %} &ndash; {{vote.comment}}{% endif %}</li>
+        <li>{{vote.user.username}} {% if vote.seen %}(seen){% endif %} &ndash; {% if vote.vote == 1 %}👍{% elif vote.vote == 0 %}No opinion{% elif vote.vote == -1 %}👎{%endif%}{% if vote.comment != "" %} &ndash; {{vote.comment}}{% endif %}</li>
         {% endfor %}
     </ul>
     {% endif %}