Function peel_blocks 

pub fn peel_blocks<'a>(expr: &'a Expr<'a>) -> &'a Expr<'a>

Removes blocks around an expression, only if the block contains just one expression and no statements. Unsafe blocks are not removed.

Examples:

• {} -> {}
• { x } -> x
• {{ x }} -> x
• { x; } -> { x; }
• { x; y } -> { x; y }
• { unsafe { x } } -> unsafe { x }