cargo clippy --fix

src/i18n.rs

@@ -75,8 +75,7 @@ pub fn i18n_filter(
 
     let langs = args
         .get("lang")
-        .map(|value| value.as_array())
+        .and_then(|value| value.as_array())
-        .flatten()
         .map(|array| {
             let mut langs = Vec::with_capacity(array.len());
             for lang in array {

src/routes/get_challenge.rs

@@ -25,7 +25,7 @@ pub async fn get_challenge(
             lang: cookies
                 .get(LANG_COOKIE)
                 .map(|cookie| vec![cookie.value().to_owned()])
-                .or_else(|| accept_language.0)
+                .or(accept_language.0)
                 .unwrap_or_else(|| vec![DEFAULT_LANG.to_owned()]),
             user: User::get(cookies).await.unwrap(),
             content: Challenge::get(challenge),