diff --git a/src/model/data.rs b/src/model/data.rs
index 971a39c0..08c5aebd 100644
--- a/src/model/data.rs
+++ b/src/model/data.rs
@@ -1,12 +1,10 @@
 ///! Implements data structures for https://www.w3.org/TR/rdf11-concepts/
 ///! Inspired by [RDFjs](http://rdf.js.org/)
-
 use std::fmt;
 use std::option::Option;
 use std::sync::Arc;
 use std::sync::Mutex;
 
-
 /// A RDF [IRI](https://www.w3.org/TR/rdf11-concepts/#dfn-iri)
 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct NamedNode {