Attempt to work around E0425 in test macros on Rust 1.8

traits/src/cast.rs

@@ -468,7 +468,7 @@ fn to_primitive_float() {
 
 macro_rules! test_wrapping_to_primitive {
     ($($t:ty)+) => {
-        $(
+        $({
             let i: $t = 0;
             let w = Wrapping(i);
             assert_eq!(i.to_u8(),    w.to_u8());
@@ -483,7 +483,7 @@ macro_rules! test_wrapping_to_primitive {
             assert_eq!(i.to_isize(), w.to_isize());
             assert_eq!(i.to_f32(),   w.to_f32());
             assert_eq!(i.to_f64(),   w.to_f64());
-        )+   
+        })+   
     };
 }
 

traits/src/sign.rs

@@ -190,7 +190,7 @@ impl<T: Unsigned> Unsigned for Wrapping<T> where Wrapping<T>: Num {}
 
 macro_rules! test_signed_wrapping {
     ($($t:ty)+) => {
-        $(
+        $({
             let range = -1 as $t .. 2 as $t;
             for i in range.clone() {
                 let w = Wrapping(i);
@@ -202,7 +202,7 @@ macro_rules! test_signed_wrapping {
                 assert_eq!(i.is_positive(), w.is_positive());
                 assert_eq!(i.is_negative(), w.is_negative());
             }
-        )+   
+        })+   
     };
 }