Merge #301: node/mod.rs: fix new clippy lint

5e9c106 node/mod.rs: fix new clippy lint (Andrew Poelstra)

Pull request description:

  Should fix #292.


ACKs for top commit:
  canndrew:
    ACK 5e9c106


Tree-SHA512: d11271f42bb3f4f29b734b15db27801ac1f00d3dc1781efbceb9336916a8b21e8583745268034bbc6936ba22068ef079f17dc7e1dea1f764fc70e3109612a35d

Author: apoelstra

src/node/mod.rs

@@ -711,7 +711,7 @@ impl<N: Marker> Node<N> {
         Ok(converted.pop().unwrap())
     }
 
-    pub fn display(&self) -> Display<N> {
+    pub fn display(&self) -> Display<'_, N> {
         Display::from(self)
     }