Motivated by inconsistancies found while documenting BView.
Update copyright year, alphabetize
Variable names normalized:
* pt => point
* r => rect
* p => pattern
* c => color
* msg => message
* a, b and pt0, pt1 => start, end
* r, g, b, a => red, green, blue, alpha
A couple of white spaces fixes.
A couple of !pointer => pointer == NULL fixes.
GetPreferredSize params => _width and _height to indicate out params.
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