Thats weird. I searched and the only project with this guideline was mono. Every other place(http://blogs.msdn.com/b/brada/archive/2005/01/26/361363.aspx, http://www.icsharpcode.net/technotes/sharpdevelopcodingstyle03.pdf (and visual studio by default) does indent them like this. It might be a good idea to put this into the contribution guideline. If there are no special rules mentioned I usually use VS defaults.