updated metadatapath docs for clairity on not including extensions
diff --git a/src/metadata.rs b/src/metadata.rs
index f694d5f..7347ac5 100644
--- a/src/metadata.rs
+++ b/src/metadata.rs
@@ -534,7 +534,20 @@
}
}
-/// Wrapper for a path to metadata
+/// Wrapper for a path to metadata.
+///
+/// Note: This should **not** contain the file extension. This is automatically added by the
+/// library depending on what type of data interchange format is being used.
+///
+/// ```
+/// use tuf::metadata::MetadataPath;
+///
+/// // right
+/// let _ = MetadataPath::new("root".into());
+///
+/// // wrong
+/// let _ = MetadataPath::new("root.json".into());
+/// ```
#[derive(Debug, Clone, PartialEq, Hash, Eq, Serialize)]
pub struct MetadataPath(String);
