Auto merge of #34245 - ollie27:rustdoc_redirect_rename, r=alexcrichton

rustdoc: Fix redirect pages for renamed reexports

We need to use the name of the target not the name of the current item
when creating the link.

An example in `std` is [`std::sys::ext`](https://doc.rust-lang.org/nightly/std/sys/ext/index.html).

1 files changed, 32 insertions, 0 deletions

diff --git a/src/test/rustdoc/redirect-rename.rs b/src/test/rustdoc/redirect-rename.rs
new file mode 100644
index 00000000000..b7c702dcc1f
--- /dev/null
+++ b/src/test/rustdoc/redirect-rename.rs
@@ -0,0 +1,32 @@
+// Copyright 2016 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_name = "foo"]
+
+mod hidden {
+    // @has foo/hidden/struct.Foo.html
+    // @has - '//p/a' '../../foo/struct.FooBar.html'
+    pub struct Foo {}
+
+    // @has foo/hidden/bar/index.html
+    // @has - '//p/a' '../../foo/baz/index.html'
+    pub mod bar {
+        // @has foo/hidden/bar/struct.Thing.html
+        // @has - '//p/a' '../../foo/baz/struct.Thing.html'
+        pub struct Thing {}
+    }
+}
+
+// @has foo/struct.FooBar.html
+pub use hidden::Foo as FooBar;
+
+// @has foo/baz/index.html
+// @has foo/baz/struct.Thing.html
+pub use hidden::bar as baz;