Added Wilson's HTML tweaks to the template error screen

</div>

{% if template_info %}

<div id="template">

   <h2>Template</h2>

   In template {{ template_info.name }}, error at line {{ template_info.line }}

   <div>{{ template_info.message|escape }}</div>

   <h2>Template error</h2>

   <p>In template <code>{{ template_info.name }}</code>, error at line <strong>{{ template_info.line }}</strong></p>

   <h3>{{ template_info.message|escape }}</h3>

   <table class="source{% if template_info.top %} cut-top{% endif %}{% ifnotequal template_info.bottom template_info.total %} cut-bottom{% endifnotequal %}">

   {% for source_line in template_info.source_lines %}

   {% ifequal source_line.0 template_info.line %}

       <tr class="error"><td>{{ source_line.0 }}</td>

       <tr class="error"><th>{{ source_line.0 }}</th>

       <td>{{ template_info.before }}<span class="specific">{{ template_info.during }}</span>{{ template_info.after }}</td></tr>

   {% else %}

      <tr><td>{{ source_line.0 }}</td>

      <tr><th>{{ source_line.0 }}</th>

      <td> {{ source_line.1 }}</td></tr>

   {% endifequal %}

   {% endfor %}