<form action="{% url discussion_search %}" method="POST">
  {% csrf_token %}
  {{ search_form }}
  <span class="button"><input type="submit" value="search"></span>
</form>

<form action="{% url discussion_search %}" method="POST" class="forum-search-form">
  {% csrf_token %}
  {{ search_form }}
  <span class="button"><input type="submit" value="search"></span>
</form>

Add class to search form to aid styling
Add class to search form to aid styling
