Fixed #9674 - documented app_label.
Fixed #9674 - documented app_label.

Thanks to andymckay for the report and jpaulett for the patch.

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extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4011596

Belgabor/django,Belgabor/django,Belgabor/django