Add renaming tests

Author: flip1995

tests/ui/rename.rs

@@ -0,0 +1,13 @@
+// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution.
+//
+// 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.
+
+#![allow(stutter)]
+
+#[warn(clippy::stutter)]
+fn main() {}

tests/ui/rename.stderr

@@ -0,0 +1,18 @@
+error: unknown lint: `stutter`
+  --> $DIR/rename.rs:10:10
+   |
+10 | #![allow(stutter)]
+   |          ^^^^^^^
+   |
+   = note: `-D unknown-lints` implied by `-D warnings`
+
+error: lint `clippy::stutter` has been renamed to `clippy::module_name_repeat`
+  --> $DIR/rename.rs:12:8
+   |
+12 | #[warn(clippy::stutter)]
+   |        ^^^^^^^^^^^^^^^ help: use the new name: `clippy::module_name_repeat`
+   |
+   = note: `-D renamed-and-removed-lints` implied by `-D warnings`
+
+error: aborting due to 2 previous errors
+