Auto merge of #7519 - Jarcho:rustfmt_fix, r=giraffate

Workaround rust-lang/rustfmt#4477 - relative paths in `path` attribute

See rust-lang/rustfmt#4477
changelog: None

tests/ui/implicit_hasher.rs

@@ -89,7 +89,7 @@ pub fn $name(_map: &mut HashMap<i32, i32>, _set: &mut HashSet<i32>) {}
 // and should not cause an ICE
 // See #2707
 #[macro_use]
-#[path = "../auxiliary/test_macro.rs"]
+#[path = "auxiliary/test_macro.rs"]
 pub mod test_macro;
 __implicit_hasher_test_macro!(impl<K, V> for HashMap<K, V> where V: test_macro::A);