auto merge of #13544 : klutzy/rust/pprust, r=alexcrichton

Fixes #12685

src/test/run-make/pretty-expanded/Makefile

@@ -0,0 +1,4 @@
+-include ../tools.mk
+
+all:
+	$(RUSTC) -o $(TMPDIR)/input.expanded.rs --pretty=expanded input.rs

src/test/run-make/pretty-expanded/input.rs

@@ -0,0 +1,22 @@
+// 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.
+
+#[crate_type="lib"]
+
+// #13544
+
+extern crate serialize;
+
+#[deriving(Encodable)] pub struct A;
+#[deriving(Encodable)] pub struct B(int);
+#[deriving(Encodable)] pub struct C { x: int }
+#[deriving(Encodable)] pub enum D {}
+#[deriving(Encodable)] pub enum E { y }
+#[deriving(Encodable)] pub enum F { z(int) }