clippy warnings; fmt

src/ws/mask.rs

@@ -28,7 +28,11 @@ fn apply_mask_fast32(buf: &mut [u8], mask_u32: u32) {
     // Possible first unaligned block.
     let head = min(len, (8 - (ptr as usize & 0x7)) & 0x3);
     let mask_u32 = if head > 0 {
-        let n = if head > 4 { head - 4 } else { head };
+        let n = if head > 4 {
+            head - 4
+        } else {
+            head
+        };
 
         let mask_u32 = if n > 0 {
             unsafe {