Fix error message when trait method ends with wrong token

When parsing a trait function, the function must end with either `;` or
`{` (signifying a default implementation). The error message incorrectly
stated that it must be `;` or `}`.

Fixes #6610.

Author: lilyball

src/libsyntax/parse/parser.rs

@@ -953,7 +953,7 @@ impl Parser {
               _ => {
                     p.fatal(
                         fmt!(
-                            "expected `;` or `}` but found `%s`",
+                            "expected `;` or `{` but found `%s`",
                             self.this_token_to_str()
                         )
                     );

src/test/compile-fail/issue-6610.rs

@@ -0,0 +1,13 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+trait Foo { fn a() } //~ ERROR expected `;` or `{` but found `}`
+
+fn main() {}