What we need now is software that reads bills ("in section 123.abc the text 'blah blah' is replaced by 'bleh bleh') and compiles it into before/after views of what the resulting code would be.
I just suggested this, and then scrolled down to find this.
Someone needs to take the plunge and start writing the program; throw it on Github and tell us all about it. I know people who are looking for such a tool.
