Released 2021-11-07

• Fixed fields.RadioField validators. #477 #615
• fields.FormField.populate_obj always calls setattr #675
• WTForms has a new logo. #569 #689
• Fixed fields.RadioField render_kw rendering. #490 #628 #688
• Support for optgroups in fields.SelectField and fields.SelectMultipleField. #656 #667
• Minor documentation fix. #701
• Custom separators for fields.FieldList. #681 #694
• fields.DateTimeField, fields.DateField and fields.TimeField support time formats that removes leading zeros. #703
• Refactoring: split fields/core.py and fields/simple.py #710