Put a space after the bang operators (
!!!) but not before them. Do not confuse
# Good call(!! xyz) # Bad call( !! xyz) call(! !xyz)
5.2 Operator precedence
Since all arithmetic and comparison operators bind more tightly than bang operators, one should be explicit about operator precedence. Enclose the expression to unquote in parenthesis if arithmetic or comparison operators are involved.
# Bad quo(1 + !! 1 + 2 + 3) # Good quo(1 + (!! 1 + 2 + 3))