cargo fmt.

rtchallenge/src/camera.rs

@@ -2,7 +2,7 @@ use std::{
     str::FromStr,
     sync::{
         mpsc::{sync_channel, Receiver, SyncSender},
-        {Arc, Mutex},
+        Arc, Mutex,
     },
     thread,
 };

rtchallenge/src/canvas.rs

@@ -1,6 +1,4 @@
-use std::fs::File;
-use std::io::BufWriter;
-use std::path::Path;
+use std::{fs::File, io::BufWriter, path::Path};
 
 use png;
 use thiserror::Error;

rtchallenge/src/matrices.rs

@@ -1,5 +1,7 @@
-use std::fmt;
-use std::ops::{Index, IndexMut, Mul, Sub};
+use std::{
+    fmt,
+    ops::{Index, IndexMut, Mul, Sub},
+};
 
 use crate::{tuples::Tuple, Float, EPSILON};