diff --git a/src/challenge.rs b/src/challenge.rs
index 2cc336b..2f5d073 100644
--- a/src/challenge.rs
+++ b/src/challenge.rs
@@ -4,7 +4,7 @@ use std::str::FromStr;
 use serde::{Deserialize, Deserializer, Serialize};
 use serde_yaml::Value;
 
-use crate::kyujitai::{Kyujitai, self};
+use crate::kyujitai::Kyujitai;
 
 #[derive(Serialize, Deserialize)]
 pub struct Challenge {
@@ -46,22 +46,16 @@ impl<'de> Deserialize<'de> for ChallengeWord {
             ));
         };
         let text = map.get("text").map(|value| match value {
-            Value::String(string) => vec![Furigana::new(
-                string.clone(),
-                None,
-            )],
+            Value::String(string) => vec![Furigana::new(string.clone(), None)],
             Value::Sequence(sequence) => sequence
                 .iter()
                 .map(|value| match value {
-                    Value::String(kanji) => Furigana::new(
-                        kanji.to_owned(),
-                        None,
-                    ),
+                    Value::String(kanji) => Furigana::new(kanji.to_owned(), None),
                     Value::Mapping(mapping) => {
                         let (kanji, furigana) = mapping.iter().next().unwrap();
                         Furigana::new(
                             kanji.as_str().unwrap().to_owned(),
-                            Some(furigana.as_str().unwrap().to_owned())
+                            Some(furigana.as_str().unwrap().to_owned()),
                         )
                     }
                     _ => panic!(),
@@ -79,7 +73,12 @@ impl<'de> Deserialize<'de> for ChallengeWord {
                 }),
                 _ => panic!("dictionary must be string!"),
             },
-            None => text.as_ref().map(|furigana| furigana.iter().map(|segment| segment.kanji.clone()).collect()),
+            None => text.as_ref().map(|furigana| {
+                furigana
+                    .iter()
+                    .map(|segment| segment.kanji.clone())
+                    .collect()
+            }),
         };
         let pos: Option<PartOfSpeech> = map
             .get("pos")
diff --git a/src/kyujitai.rs b/src/kyujitai.rs
index 1de0534..d90aad6 100644
--- a/src/kyujitai.rs
+++ b/src/kyujitai.rs
@@ -362,11 +362,11 @@ impl Kyujitai for String {
         'outer: for shinjitai in self.chars() {
             for (other_shinjitai, kyujitai) in KYUJITAI {
                 if shinjitai == *other_shinjitai {
-                    output.push(kyujitai.clone());
+                    output.push(*kyujitai);
                     continue 'outer;
                 }
             }
-            output.push(shinjitai.clone());
+            output.push(shinjitai);
         }
         output
     }
@@ -376,11 +376,11 @@ impl Kyujitai for String {
         'outer: for kyujitai in self.chars() {
             for (shinjitai, other_kyujitai) in KYUJITAI {
                 if kyujitai == *other_kyujitai {
-                    output.push(shinjitai.clone());
+                    output.push(*shinjitai);
                     continue 'outer;
                 }
             }
-            output.push(kyujitai.clone());
+            output.push(kyujitai);
         }
         output
     }
diff --git a/src/main.rs b/src/main.rs
index 3f15718..afaf37e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,17 +2,17 @@
 extern crate rocket;
 
 use core::panic;
+use rocket::fs::{relative, FileServer};
+use rocket::http::{Cookie, CookieJar};
+use rocket::request::{FlashMessage, FromRequest};
+use rocket::response::{Flash, Redirect};
+use rocket::{request, Request};
+use rocket_dyn_templates::{context, Template};
+use sass_rocket_fairing::SassFairing;
 use std::collections::HashMap;
 use std::convert::Infallible;
 use std::env;
-use rocket::fs::{FileServer, relative};
-use rocket::{Request, request};
-use rocket::http::{Cookie, CookieJar};
-use rocket::request::{FromRequest, FlashMessage};
-use rocket::response::{Redirect, Flash};
-use rocket_dyn_templates::{context, Template};
 use std::fs;
-use sass_rocket_fairing::SassFairing;
 
 mod challenge;
 use challenge::Challenge;
@@ -108,13 +108,16 @@ fn logout(cookies: &CookieJar<'_>, referer: Referer) -> Redirect {
             params.insert("token", token);
             params
         };
-        match client.post("https://discord.com/api/oauth2/token/revoke")
+        match client
+            .post("https://discord.com/api/oauth2/token/revoke")
             .header("Content-Type", "application/x-www-form-urlencoded")
             .form(&params)
-            .send().await {
-                Ok(_) => println!("Successfully revoked token"),
-                Err(error) => println!("Failed to revoke token: {:?}", error),
-            };
+            .send()
+            .await
+        {
+            Ok(_) => println!("Successfully revoked token"),
+            Err(error) => println!("Failed to revoke token: {:?}", error),
+        };
     });
     cookies.remove_private(Cookie::named(TOKEN_COOKIE));
     let redirect_url = referer.0.unwrap_or("/".to_owned());