message: Allow `unreadable_literal` lint.
diff: #![cfg_attr(feature = "clippy", plugin(clippy))]
  #![cfg_attr(feature = "clippy", allow(inline_always))]
  #![cfg_attr(feature = "clippy", allow(too_many_arguments))]
  +#![cfg_attr(feature = "clippy", allow(unreadable_literal))]
  // The compiler provides `test` (on nightly) for benchmarking tools, but
  // it's hidden behind a feature flag. Enable it if we're testing.
  