forms.Field with space in dynamically generated forms.Form leads to wrong assigned id in generated HTML form

[pdehaye]

If you do:

import django
from django.forms import Form
from django.forms import CharField
PersonForm = type('Person', (Form,), {"work address":CharField(max_length=128)})
person = PersonForm()
person.as_ul()

You get

'<li><label for="id_work address">Work address:</label> <input type="text" name="work address" maxlength="128" required id="id_work address" /></li>'

I think the id="id_work address" is suboptimal here. Maybe everything should be underscored? At least the doc, which references id_<field-name>, should be improved (also present in 2.0 doc)