From 59fc76a2d462746e9f79a7694dbb6737cfe9968c Mon Sep 17 00:00:00 2001
From: Max Bradbury <max@tinybird.info>
Date: Sat, 17 Oct 2020 11:42:37 +0100
Subject: [PATCH] implement Format instead of just ToString

---
 src/exit.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/exit.rs b/src/exit.rs
index 9d37cee..b53968d 100644
--- a/src/exit.rs
+++ b/src/exit.rs
@@ -2,6 +2,7 @@ use crate::Position;
 use std::str::FromStr;
 use std::error::Error;
 use std::fmt;
+use std::fmt::{Display, Formatter};
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum Transition {
@@ -32,9 +33,9 @@ impl From<&str> for Transition {
     }
 }
 
-impl ToString for Transition {
-    fn to_string(&self) -> String {
-        match &self {
+impl Display for Transition {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", match &self {
             Transition::FadeToWhite => " FX fade_w",
             Transition::FadeToBlack => " FX fade_b",
             Transition::Wave        => " FX wave",
@@ -44,8 +45,7 @@ impl ToString for Transition {
             Transition::SlideLeft   => " FX slide_l",
             Transition::SlideRight  => " FX slide_r",
             Transition::None        => "",
-        }
-        .to_string()
+        })
     }
 }