Silent buggy clippy warnings

src/uu/dirname/src/dirname.rs

@@ -5,6 +5,9 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
+// Clippy bug: https://github.com/rust-lang/rust-clippy/issues/7422
+#![allow(clippy::nonstandard_macro_braces)]
+
 #[macro_use]
 extern crate uucore;
 

src/uu/hostid/src/hostid.rs

@@ -7,6 +7,9 @@
 
 // spell-checker:ignore (ToDO) gethostid
 
+// Clippy bug: https://github.com/rust-lang/rust-clippy/issues/7422
+#![allow(clippy::nonstandard_macro_braces)]
+
 #[macro_use]
 extern crate uucore;
 

src/uu/hostname/src/hostname.rs

@@ -7,6 +7,9 @@
 
 // spell-checker:ignore (ToDO) MAKEWORD addrs hashset
 
+// Clippy bug: https://github.com/rust-lang/rust-clippy/issues/7422
+#![allow(clippy::nonstandard_macro_braces)]
+
 #[macro_use]
 extern crate uucore;