Re: complex statement requires indentation

[lightness1024]

Thanks. also philosophical question, I'm not sure that in C# "empty" is part of 
the conditions verified by this operator. I think it's only null. So empty 
sequences, or empty strings would not trigger the false case. Maybe we should 
define a strictly nil only coalescing operator as ?? and the nil or empty 
coalescing operator as ??? (triple mark) because it has more greed.