Eliminate some extraneous curly brackets inside invocations of macro_rules!.

src/libcore/future.rs

@@ -65,7 +65,7 @@ fn from_value<A>(+val: A) -> Future<A> {
 }
 
 macro_rules! move_it (
-    {$x:expr} => { unsafe { let y <- *ptr::addr_of($x); y } }
+    ($x:expr) => { unsafe { let y <- *ptr::addr_of($x); y } }
 )
 
 fn from_port<A:send>(+port: future_pipe::client::waiting<A>) -> Future<A> {

src/libcore/task.rs

@@ -1033,7 +1033,7 @@ fn kill_taskgroup(state: TaskGroupInner, me: *rust_task, is_main: bool) {
 // a proper closure because the #[test]s won't understand. Have to fake it.
 macro_rules! taskgroup_key (
     // Use a "code pointer" value that will never be a real code pointer.
-    {} => (unsafe::transmute((-2 as uint, 0u)))
+    () => (unsafe::transmute((-2 as uint, 0u)))
 )
 
 fn gen_child_taskgroup(linked: bool, supervised: bool)