plone/plone.autoform — pull request #8 by datakurre (2014-09-15 13:14:04+00:00)
Title: Fix to fieldset bookeeping to avoid creation of duplicate fieldsets

See also: https://community.plone.org/t/add-field-to-existing-fieldset-in-inherited-behavior/277

TODO: A test. I'll manage to write it today or not at all :)