Use cargo fmt to reformat code

Author: luojia65

src/register/scause.rs

@@ -127,15 +127,17 @@ pub unsafe fn write(bits: usize) {
 #[inline]
 pub unsafe fn set(cause: Trap) {
     let bits = match cause {
-        Trap::Interrupt(i) => (match i {
-            Interrupt::UserSoft => 0,
-            Interrupt::SupervisorSoft => 1,
-            Interrupt::UserTimer => 4,
-            Interrupt::SupervisorTimer => 5,
-            Interrupt::UserExternal => 8,
-            Interrupt::SupervisorExternal => 9,
-            Interrupt::Unknown => panic!("unknown interrupt"),
-        } | (1 << (size_of::<usize>() * 8 - 1))), // interrupt bit is 1
+        Trap::Interrupt(i) => {
+            (match i {
+                Interrupt::UserSoft => 0,
+                Interrupt::SupervisorSoft => 1,
+                Interrupt::UserTimer => 4,
+                Interrupt::SupervisorTimer => 5,
+                Interrupt::UserExternal => 8,
+                Interrupt::SupervisorExternal => 9,
+                Interrupt::Unknown => panic!("unknown interrupt"),
+            } | (1 << (size_of::<usize>() * 8 - 1)))
+        } // interrupt bit is 1
         Trap::Exception(e) => match e {
             Exception::InstructionMisaligned => 0,
             Exception::InstructionFault => 1,
@@ -149,7 +151,7 @@ pub unsafe fn set(cause: Trap) {
             Exception::LoadPageFault => 13,
             Exception::StorePageFault => 15,
             Exception::Unknown => panic!("unknown exception"),
-        } // interrupt bit is 0
+        }, // interrupt bit is 0
     };
     _write(bits);
 }