sort uses

@@ -23,10 +23,10 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 use std::cmp::Ordering;
-use std::ops::{Add,Sub,Neg,Mul,Div};
-use std::fmt;
 use std::convert::{TryFrom, TryInto};
+use std::fmt;
 use std::num::TryFromIntError;
+use std::ops::{Add,Sub,Neg,Mul,Div};
 
 #[derive(Debug, Eq, Clone, Copy)]
 pub struct Fractional (pub i64, pub i64);