lib.rs in trackler-2.2.1.117

- old
+ new

@@ -1,4 +1,4 @@
 /// Determines whether the supplied string is a valid ISBN number
-pub fn is_valid_isbn(_isbn: &str) -> bool {
-    unimplemented!();
+pub fn is_valid_isbn(isbn: &str) -> bool {
+    unimplemented!("Is {:?} a valid ISBN number?", isbn);
 }