back-ticks

src/libsyntax/parse/parser.rs

@@ -3310,7 +3310,7 @@ pub impl Parser {
                 }
             }
             if fields.len() == 0 {
-                self.fatal(fmt!("Unit-like struct should be written as: struct %s;",
+                self.fatal(fmt!("Unit-like struct should be written as `struct %s;`",
                                 *self.interner.get(class_name)));
             }
             self.bump();

src/test/compile-fail/struct-no-fields.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern: Unit-like struct should be written as: struct Foo;
+// error-pattern: Unit-like struct should be written as `struct Foo;`
 struct Foo {}
 
 fn main() {}