Understanding the ManagementForm section could be clearer.
"You may have noticed the additional data that was required in the formset's data above."
should probably be specific like:
"You may have noticed the additional data (form-TOTAL_FORMS and form-INITIAL_FORMS) that was required in the formset's data above."
It would also be nice if it said something like:
"The easy way to add this data to your form is to include {{formset.management_form}} in your template."
After the:
"If you don't use it, it will result in an exception"
line.
I overlooked that line in the template example, but it took a lot of googling to figure out how to fix it, even though I immediately found the managementform section.
(In [13222]) Fixed #11908 -- Clarified the role and usage of the ManagementForm in formsets. Thanks to timo for the draft patch.