diff --git a/src/main.rs b/src/main.rs
index 9b241ba..34d4f30 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -160,7 +160,10 @@ where
 #[cfg(test)]
 mod test {
     use super::*;
-    impl <I> Decoder <I> where I: Iterator<Item=u8> {
+    impl<I> Decoder<I>
+    where
+        I: Iterator<Item = u8>,
+    {
         // A hack to unit test the index lookup behavior. A partial test can be done
         // to verify the basic indexing principles by preloading a known buffer and
         // then extracting back-referenced data out of it. A complete test should
@@ -479,26 +482,38 @@ mod test {
     #[test]
     fn decoder_prev_pixel_verify() {
         let compressed = [
-            QOI_OP_RGB, 0x10, 0x10, 0x10,
-            QOI_OP_RGBA, 0x20, 0x20, 0x20, 0x20,
+            QOI_OP_RGB,
+            0x10,
+            0x10,
+            0x10,
+            QOI_OP_RGBA,
+            0x20,
+            0x20,
+            0x20,
+            0x20,
             (QOI_OP_INDEX | 1),
             (QOI_OP_DIFF | 0b0011_1111),
-            (QOI_OP_LUMA | 0b0011_1111), 0b1111_1111,
+            (QOI_OP_LUMA | 0b0011_1111),
+            0b1111_1111,
             (QOI_OP_RUN | 2),
-            QOI_OP_RGBA, 0xFF, 0xFF, 0xFF, 0xFF,
+            QOI_OP_RGBA,
+            0xFF,
+            0xFF,
+            0xFF,
+            0xFF,
         ];
 
         let expected = [
             PixelRGBA::new(0, 0, 0, 0xFF),          // init
-            PixelRGBA::new(0x10, 0x10, 0x10, 0xFF), // RGB 
+            PixelRGBA::new(0x10, 0x10, 0x10, 0xFF), // RGB
             PixelRGBA::new(0x20, 0x20, 0x20, 0x20), // RGBA
-            PixelRGBA::new(0, 0, 0, 0),             // INDEX -- this doubles as a small test for the backbuffer operation
-            PixelRGBA::new(0x1, 0x1, 0x1, 0x0),     // DIFF
-            PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // LUMA
-            PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // RUN 1
-            PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // RUN 2
-            PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // RUN 3
-            PixelRGBA::new(0xFF, 0xFF, 0xFF, 0xFF)
+            PixelRGBA::new(0, 0, 0, 0), // INDEX -- this doubles as a small test for the backbuffer operation
+            PixelRGBA::new(0x1, 0x1, 0x1, 0x0), // DIFF
+            PixelRGBA::new(0x27, 0x20, 0x27, 0x0), // LUMA
+            PixelRGBA::new(0x27, 0x20, 0x27, 0x0), // RUN 1
+            PixelRGBA::new(0x27, 0x20, 0x27, 0x0), // RUN 2
+            PixelRGBA::new(0x27, 0x20, 0x27, 0x0), // RUN 3
+            PixelRGBA::new(0xFF, 0xFF, 0xFF, 0xFF),
         ];
 
         let mut decoder = Decoder::new(compressed.into_iter());
@@ -516,21 +531,37 @@ mod test {
     #[test]
     fn decoder_backbuffer_verify() {
         let compressed = [
-            QOI_OP_RGB, 0x10, 0x10, 0x10,
-            QOI_OP_RGBA, 0x20, 0x20, 0x20, 0x20,
-            QOI_OP_RGBA, 0x03, 0x01, 0x01, 0x04, // filler to populate backbuffer[1] for the next OP_INDEX
+            QOI_OP_RGB,
+            0x10,
+            0x10,
+            0x10,
+            QOI_OP_RGBA,
+            0x20,
+            0x20,
+            0x20,
+            0x20,
+            QOI_OP_RGBA,
+            0x03,
+            0x01,
+            0x01,
+            0x04, // filler to populate backbuffer[1] for the next OP_INDEX
             (QOI_OP_INDEX | 1),
-            (QOI_OP_DIFF | 0b0011_1111),                // + Pix (1, 1, 1, 0)
-            (QOI_OP_LUMA | 0b0011_1111), 0b1111_1111,   // + Pix (38, 31, 38)
+            (QOI_OP_DIFF | 0b0011_1111), // + Pix (1, 1, 1, 0)
+            (QOI_OP_LUMA | 0b0011_1111),
+            0b1111_1111, // + Pix (38, 31, 38)
             (QOI_OP_RUN | 2),
-            QOI_OP_RGBA, 0xFF, 0xFF, 0xFF, 0xFF,
+            QOI_OP_RGBA,
+            0xFF,
+            0xFF,
+            0xFF,
+            0xFF,
         ];
         // these are the indices where we're expecting each pixel to land.
         // Each pixel gets put into this backbuffer as it's en/de-coded.
         // For RGB and RGBA, it'll simply assign a value into the index.
-        
+
         // For INDEX, the write can be skipped, and the expected index will be
-        //  the same as the one in the op code. 
+        //  the same as the one in the op code.
         //  *however* it's possible for an index to refer to a value that shouldn't
         //  hash to that location. The backbuffer initialization will cause this
         //  scenario.
@@ -549,7 +580,7 @@ mod test {
             1,  // Pix (3, 1, 1, 4)
             16, // Pix (4, 2, 2, 4)
             39, // Pix (42, 33, 40, 4)
-            39, // run x1 
+            39, // run x1
             39, // run x2
             39, // run x3
             38, // final RGBA
@@ -562,7 +593,7 @@ mod test {
 
                 // query it out:
                 let stored_px = decoder.peek_backbuffer(indices[iters]);
-                
+
                 // and compare it to the value returned from iteration
                 assert_eq!(&pixel, stored_px);
             } else {