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Author: Alexendoo

Cargo.toml

@@ -32,6 +32,7 @@ anstream = "0.6.0"
 [dev-dependencies]
 cargo_metadata = "0.18.1"
 ui_test = "0.25"
+prettydiff = "0.7"
 regex = "1.5.5"
 serde = { version = "1.0.145", features = ["derive"] }
 serde_json = "1.0.122"

tests/config-metadata.rs

@@ -39,7 +39,8 @@ and lints affected.
         if env::var_os("RUSTC_BLESS").is_some_and(|v| v != "0") {
             fs::write(path, expected).unwrap();
         } else {
-            panic!("`{path}` is out of date, run `cargo bless --test config-metadata` to update it");
+            let diff = prettydiff::diff_lines(&current, &expected);
+            panic!("`{path}` is out of date, run `cargo bless --test config-metadata` to update it\n{diff}");
         }
     }
 }