When originally added, this test used to contain a `#![plugin(clippy)]`.
This was removed at some point along the way, at which point this test
no longer tests anything. It prints:
warning: unknown lint: `identity_op`
--> src/main.rs:1:9
|
1 | #![deny(identity_op)]
| ^^^^^^^^^^^
|
= note: #[warn(unknown_lints)] on by default
which is swallowed and ignored by compiletest.
Nowadays Clippy handles warnings inside of macro expanded code
intelligently and this is something they would be responsible for
testing.
