Standardized formatting in technical 500 template.

- Prefer use of `k` and `v` instead of `var.0` and `var.1`.
- Fixed indentation of #files-info block to match adjacent blocks.

django/views/templates/technical_500.html

@@ -390,6 +390,7 @@ Exception Value: {{ exception_value|force_escape }}
   {% else %}
     <p>No POST data</p>
   {% endif %}
+
   <h3 id="files-info">FILES</h3>
   {% if request.FILES %}
     <table class="req">
@@ -412,7 +413,6 @@ Exception Value: {{ exception_value|force_escape }}
     <p>No FILES data</p>
   {% endif %}
 
-
   <h3 id="cookie-info">COOKIES</h3>
   {% if request.COOKIES %}
     <table class="req">
@@ -444,10 +444,10 @@ Exception Value: {{ exception_value|force_escape }}
       </tr>
     </thead>
     <tbody>
-      {% for var in request_meta.items|dictsort:0 %}
+      {% for k, v in request_meta.items|dictsort:0 %}
         <tr>
-          <td>{{ var.0 }}</td>
+          <td>{{ k }}</td>
-          <td class="code"><pre>{{ var.1|pprint }}</pre></td>
+          <td class="code"><pre>{{ v|pprint }}</pre></td>
         </tr>
       {% endfor %}
     </tbody>
@@ -466,10 +466,10 @@ Exception Value: {{ exception_value|force_escape }}
       </tr>
     </thead>
     <tbody>
-      {% for var in settings.items|dictsort:0 %}
+      {% for k, v in settings.items|dictsort:0 %}
         <tr>
-          <td>{{ var.0 }}</td>
+          <td>{{ k }}</td>
-          <td class="code"><pre>{{ var.1|pprint }}</pre></td>
+          <td class="code"><pre>{{ v|pprint }}</pre></td>
         </tr>
       {% endfor %}
     </tbody>