Add trailing commas; clean up formatting

app-proto/examples/kaleidocycle.rs

@@ -23,7 +23,7 @@ fn main() {
         let twist_motion: DMatrix<_> = (0..N_POINTS).step_by(4).flat_map(
             |n| [
                 tangent.proj(&up.as_view(), n),
-                tangent.proj(&down.as_view(), n+1)
+                tangent.proj(&down.as_view(), n+1),
             ]
         ).sum();
         let normalization = 5.0 / twist_motion[(2, 0)];