fix metadatapath doctest
diff --git a/src/metadata.rs b/src/metadata.rs
index 7347ac5..7e8c71a 100644
--- a/src/metadata.rs
+++ b/src/metadata.rs
@@ -574,17 +574,18 @@
}
/// Create a metadata path from the given role.
+ ///
/// ```
/// use tuf::metadata::{Role, MetadataPath};
///
/// assert_eq!(MetadataPath::from_role(&Role::Root),
- /// MetadataPath::new("root".into()))
+ /// MetadataPath::new("root".into()).unwrap());
/// assert_eq!(MetadataPath::from_role(&Role::Snapshot),
- /// MetadataPath::new("snapshot".into()))
+ /// MetadataPath::new("snapshot".into()).unwrap());
/// assert_eq!(MetadataPath::from_role(&Role::Targets),
- /// MetadataPath::new("targets".into()))
+ /// MetadataPath::new("targets".into()).unwrap());
/// assert_eq!(MetadataPath::from_role(&Role::Timestamp),
- /// MetadataPath::new("timestamp".into()))
+ /// MetadataPath::new("timestamp".into()).unwrap());
/// ```
pub fn from_role(role: &Role) -> Self {
Self::new(format!("{}", role)).unwrap()
