Before formatting: ``` trait A {} pub struct B<const N: usize>([usize; N]); impl<const N: usize> A for B<{ N }> { } ``` After formatting: ``` trait A {} pub struct B<const N: usize>([usize; N]); impl<const N: usize> A for B<{ N }> { N }> {} ``` Used 1.2.2 nightly (2019-04-24 5274b49)