test: Fix parsing problem in map-types.rs

Author: pcwalton

src/test/compile-fail/map-types.rs

@@ -6,7 +6,7 @@ import std::map::map;
 // Test that trait types printed in error msgs include the type arguments.
 
 fn main() {
-    let x: map<~str,~str> = map::str_hash::<~str>() as @map::<~str,~str>;
+    let x: map<~str,~str> = map::str_hash::<~str>() as map::<~str,~str>;
     let y: map<uint,~str> = x;
     //~^ ERROR mismatched types: expected `@std::map::map<uint,~str>`
 }