What is the preferred coding style for the struct expression?

Given:

struct Point {
    x: float,
    y: float
}

Point { x: 1.0, y: 1.0 } // (1)
Point{x: 1.0, y: 1.0} // (2)

Tutorial uses 1, pretty printer does 2. It seems to me that when an expression 
is on
multiple lines, spaces are common, but for a single line it is mixed. 
core::path uses 1,
but core::iterator uses 2.
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