config macros: Tidy up a message

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/macros/macros.rs b/macros/macros.rs
index 93b1d8a4d6bba04f5ac663f92626815f885cd3a0..a4330dd63c9696f37a9387751a0531a5923e7564 100644 (file)
--- a/macros/macros.rs
+++ b/macros/macros.rs
@@ -103,7 +103,7 @@ pub fn resolve(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
     }
     let fname_string = fname.to_string();
     let fname_lit = Literal::string( &fname_string );
-    let skl = skl.expect(&format!("SKL not specified! (field {:?})!", fname));
+    let skl = skl.expect(&format!("SKL not specified! (field {})!", fname));
 
     names.push(quote!{
       (#fname_lit, #skl),