Fix should_panic attributes

src/arch/mod.rs

@@ -81,7 +81,7 @@ mod tests {
   }
 
   #[test]
-  #[should_panic="arg=0"]
+  #[should_panic(expected = "arg=0")]
   fn panic_after_start() {
     unsafe {
       let stack = OsStack::new(4 << 20).unwrap();
@@ -92,7 +92,7 @@ mod tests {
   }
 
   #[test]
-  #[should_panic="arg=1"]
+  #[should_panic(expected = "arg=1")]
   fn panic_after_swap() {
     unsafe {
       let stack = OsStack::new(4 << 20).unwrap();

tests/stack.rs

@@ -48,7 +48,7 @@ fn slice_too_small() {
 }
 
 #[test]
-#[should_panic="SliceStack too small"]
+#[should_panic(expected = "SliceStack too small")]
 fn slice_too_small_unaligned() {
   unsafe {
     let ptr = heap::allocate(STACK_ALIGNMENT, STACK_ALIGNMENT);