Fix the most egregious instances of "local ambiguity: multiple parsing options..." error in macros, which often occurs when trying to match parts of Rust syntax.

For example, this matcher: `fn $name:ident( $($param:ident : $pty:ty),* )` would fail when parsing `fn foo()`, because macro parser wouldn't realize that an ident cannot start with `)`.

This resolves #5902, and at least partially mitigates #9364 and #3232.

src/test/run-pass/macro-nt-list.rs

@@ -0,0 +1,30 @@
+// Copyright 2014 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.
+
+#![feature(macro_rules)]
+
+macro_rules! list (
+    ( ($($id:ident),*) ) => (());
+    ( [$($id:ident),*] ) => (());
+    ( {$($id:ident),*} ) => (());
+)
+
+macro_rules! tt_list (
+    ( ($($tt:tt),*) ) => (());
+)
+
+pub fn main() {
+    list!( () );
+    list!( [] );
+    list!( {} );
+
+    tt_list!( (a, b, c) );
+    tt_list!( () );
+}