De-mode vec::each() and many of the str iteration routines

Note that the method foo.each() is not de-moded, nor the other
vec routines.

src/libsyntax/print/pprust.rs

@@ -1674,7 +1674,7 @@ fn print_bounds(s: ps, bounds: @~[ast::ty_param_bound]) {
         word(s.s, ~":");
         for vec::each(*bounds) |bound| {
             nbsp(s);
-            match bound {
+            match *bound {
               ast::bound_copy => word(s.s, ~"Copy"),
               ast::bound_send => word(s.s, ~"Send"),
               ast::bound_const => word(s.s, ~"Const"),