error: fmt WriteError style

src/error.rs

@@ -54,11 +54,11 @@ pub enum WriteError<B> {
 
 impl<B: fmt::Display> fmt::Display for WriteError<B> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self {
+        match &self {
             &WriteError::SpaceExhausted =>
                 write!(f, "space exhausted"),
-            &WriteError::Backend(ref e) =>
-                e.fmt(f),
+            &WriteError::Backend(err) =>
+                write!(f, "{}", err)
         }
     }
 }