Re: [PATCH 3/3] Teach 'diff' about 'nodiff' attribute.

> If I've understood the attributes system correctly, it's worth bearing 
> in mind that "!diff" is not the same as "nodiff".  The not in "!diff" 
> means "supress the attribute diff", not as you would traditionally 
> imagine "not-diff".  In this case it doesn't matter because there are 
> only two possibilities for the diff engine - show the diff or don't.  
> However, more attributes might get added that aren't so simple.
> 
> Junio - This makes me think that perhaps "!" is not the right symbol for 
> this - that's going to get read by programmers everywhere as NOT, 
> rather than suppress.  Perhaps it doesn't matter, I might be 
> over-thinking this.