Fixed #6365 -- Added `blank=True` to parent attribute of `m2o_recursive` model example, thanks dgrant.
Fixed #6365 -- Added `blank=True` to parent attribute of `m2o_recursive` model example, thanks dgrant.

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extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%407015

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel