From 626745165295c49f94e697c2ea1bf54c488cc00e Mon Sep 17 00:00:00 2001
From: Heiko Schaefer <heiko@schaefer.name>
Date: Sat, 16 Jul 2022 12:55:18 +0200
Subject: [PATCH] Clippy: avoid extra heap allocation.

---
 openpgp-card/src/card_do.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/openpgp-card/src/card_do.rs b/openpgp-card/src/card_do.rs
index caf4574..6f3a2bf 100644
--- a/openpgp-card/src/card_do.rs
+++ b/openpgp-card/src/card_do.rs
@@ -5,7 +5,7 @@
 
 use chrono::{DateTime, Utc};
 use std::convert::{TryFrom, TryInto};
-use std::fmt::{Display, Formatter};
+use std::fmt::{Display, Formatter, Write};
 use std::time::{Duration, UNIX_EPOCH};
 
 use crate::{algorithm::Algo, tlv::Tlv, Error, KeySet, KeyType, Tags};
@@ -960,7 +960,7 @@ impl Fingerprint {
         let mut fp = String::new();
 
         for i in 0..20 {
-            fp.push_str(&format!("{:02X}", self.0[i]));
+            let _ = write!(&mut fp, "{:02X}", self.0[i]);
 
             if i < 19 && (i % 2 == 1) {
                 fp.push(' ');