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-rw-r--r--compiler/rustc_builtin_macros/src/proc_macro_harness.rs3
1 files changed, 1 insertions, 2 deletions
diff --git a/compiler/rustc_builtin_macros/src/proc_macro_harness.rs b/compiler/rustc_builtin_macros/src/proc_macro_harness.rs
index a7908373b6d..7c0b36ced96 100644
--- a/compiler/rustc_builtin_macros/src/proc_macro_harness.rs
+++ b/compiler/rustc_builtin_macros/src/proc_macro_harness.rs
@@ -179,8 +179,7 @@ impl<'a> Visitor<'a> for CollectProcMacros<'a> {
                         == prev_item.path.segments[0].ident.name
                     {
                         format!(
-                            "only one `#[{}]` attribute is allowed on any given function",
-                            path_str,
+                            "only one `#[{path_str}]` attribute is allowed on any given function",
                         )
                     } else {
                         format!(