Fixed   bug

  was showing for all None values in table cells, thanks to the
autoescaping change introduced in 82261a638b

datasette/templates/table.html

@@ -44,7 +44,7 @@
             {% if not is_view %}<td><a href="/{{ database }}-{{ database_hash }}/{{ table|quote_plus }}/{{ row_link(row) }}">{{ row_link(row) }}</a></td>{% endif %}
             {% for td in row %}
                 {% if not use_rowid or (use_rowid and not loop.first) %}
-                    <td>{{ td or "&nbsp;" }}</td>
+                    <td>{{ td or "&nbsp;"|safe }}</td>
                 {% endif %}
             {% endfor %}
         </tr>