Cleanup err-msg and match(ish) it with expected

src/problem/npv_170.rs

@@ -1,19 +1,25 @@
 use std::fmt;
 
 use derive_new::new;
+use relative_path::RelativePathBuf;
 
 #[derive(Clone, new)]
 pub struct ByNamePackegPrefixedWithNumber {
     #[new(into)]
-    attribute_name: String,
+    package_name: String,
+    #[new(into)]
+    relative_package_dir: RelativePathBuf,
 }
 
 impl fmt::Display for ByNamePackegPrefixedWithNumber {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let Self { attribute_name } = self;
+        let Self {
+            package_name,
+            relative_package_dir,
+        } = self;
         write!(
             f,
-            r#"- pkgs.{attribute_name}: "Attribute names should not be number-prefixed. It is suggestet to `"`-wrap this name"#
+            r#"- {relative_package_dir}: Attribute `{package_name}` should not be number-prefixed. It is suggestet to `"`-wrap this name"#
         )
     }
 }

src/structure.rs

@@ -145,12 +145,17 @@ fn check_package(
                 .next()
                 .is_some_and(|c| c.is_ascii_digit())
             {
-                npv_170::ByNamePackegPrefixedWithNumber::new(package_name.clone()).into()
+                npv_170::ByNamePackegPrefixedWithNumber::new(
+                    package_name.clone(),
+                    relative_package_dir.clone(),
+                )
+                .into()
             } else {
                 npv_141::InvalidPackageDirectoryName::new(
                     package_name.clone(),
                     relative_package_dir.clone(),
-                ).into()
+                )
+                .into()
             }
         } else {
             Success(())

tests/by-name-numprefix/expected

@@ -1,4 +1,4 @@
 trace: This should be on stderr!
 @REDACTED@error: This is an error!@REDACTED@
-- Nix evaluation failed for some package in `pkgs/by-name`, see error above
+- pkgs/by-name/_1/10foo: Attribute `10foo` should not be number-prefixed. It is suggestet to `"`-wrap this name
 This PR introduces the problems listed above. Please fix them before merging, otherwise the base branch would break.