Default '----------' option in choices dropdowns present even when blank=False
|Reported by:||Owned by:||nobody|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
In the admin (not newforms-admin) and therefor, in old forms, fields with choices set get dropdowns whose first item is "--------" indicating "not selected".
This appears even when the field has blank=True, and it is always an error to select the "---------" option.