forms/src/GFParser.py - vbox/hbox - block - description: scrollbar?

While looking in forms/src/GFParser.py for reference, I noticed that the
description of block attribute for h,vbox tags, refers to scrollbar rather
than to h/vbox.  Not sure of the function of the block attribute of h/vbox,
I'll just mention it here.

      'vbox': {   # ...
            'block': {   # ...
               'Description': 'The {block} to which this scrollbar scrolls.' },

/Randall