Fixed indentation of an example.

docs/patterns/wtforms.rst

@@ -75,9 +75,7 @@ Here an example `_formhelpers.html` template with such a macro:
       <dd>{{ field(**kwargs)|safe }}
       {% if field.errors %}
         <ul class="errors">
-       {% for error in field.errors %}
+        {% for error in field.errors %}<li>{{ error }}{% endfor %}
-         <li>{{ error }}</li>
-       {% endfor %}
         </ul>
       {% endif %}
       </dd>