Apply Clippy recommendations

src/utils.rs

@@ -2,7 +2,11 @@ pub struct Utils {}
 
 impl Utils {
     pub fn a_else_b(a: f64, b: f64) -> f64 {
-        return if a > 0.0 { a } else { b };
+        if a > 0.0 {
+            a
+        } else {
+            b
+        }
     }
     pub fn ewma_factor(tick: f64, dur: f64) -> f64 {
         ((0.5_f64).ln() / (dur / tick)).exp()