Bug 1607697 - Address servo-tidy complaint.

Differential Revision: https://phabricator.services.mozilla.com/D59482

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/585292f2cc588b85bf502f5763d4e840c402e18e

webrender_api/src/lib.rs

@@ -12,7 +12,8 @@
 //! there.
 
 #![cfg_attr(feature = "nightly", feature(nonzero))]
-#![cfg_attr(feature = "cargo-clippy", allow(clippy::float_cmp, clippy::too_many_arguments, clippy::unreadable_literal, clippy::new_without_default))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::float_cmp, clippy::too_many_arguments))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::unreadable_literal, clippy::new_without_default))]
 
 extern crate app_units;
 #[macro_use]