Paragraph Style attributes are not overridable on a per attribute basis

[Tylerc230]

I've noticed that when I set a paragraph style attribute (such as text alignment) in the $default MTStringAttribute and then try to set a different one in one of my custom tags (like lineHeightMultiple) any text within that custom tag will not have the proper text alignment. This is because the default NSMutableParagraphStyle object is overridden if any of the attributes are modified in my custom tag's NSMutableParagraphStyle object. It would be nice to be able to override the default paragraph style attributes on an attribute by attribute basis. I'm not sure how that would be achieved though.