Documentation: Add field.help_text to looping over a form's fields

[Wim Feijen]

On ​https://docs.djangoproject.com/en/dev/topics/forms/#looping-over-the-form-s-fields

The example of looping over the form's fields omits {{ field.help_text }}, though this field is outputted by default by {{ form.as_ul }}. I believe we should add {{ field.help_text }} in the example to be both consistent and complete.

From the docs:
---
Looping over the form’s fields

If you’re using the same HTML for each of your form fields, you can reduce duplicate code by looping through each field in turn using a {% for %} loop:

{% for field in form %}
    <div class="fieldWrapper">
        {{ field.errors }}
        {{ field.label_tag }} {{ field }}
    </div>
{% endfor %}

[Tim Graham]

It seems there are many other examples on that page that could also be updated similarly. Did you single this one out for any reason? I don't know that it's really necessary, but I don't have a great argument against it besides it will be a bit repetitive in all the examples, especially if the implementation is something like {% if field.help_text %}<p>{{ field.help_text }}</p>{% endif %} so we don't output empty paragraph elements.

I removed the "In addition, but unrelated" issue from the description as I don't think there's a need to complicate the example with a particular HTML structure. ("{{ field.errors }} might need a span for the example to be usable in real life.") {{ field.errors }} already includes a <ul> which can be styled, correct?