Follow linting suggestions

src/main.rs

@@ -34,7 +34,7 @@ impl Dictionary {
     }
 }
 
-impl Iterator for Dictionary{
+impl Iterator for Dictionary {
     type Item = String;
     fn next(&mut self) -> Option<Self::Item> {
         if self.words.len() >= self.iter_position {
@@ -58,27 +58,26 @@ fn line_to_word(l: String) -> String {
 
 // i filtri dovrebbero essere creati da una struct Config{} creata parsando gli argomenti
 
-fn matches_regexp(regexp: &str) -> (impl std::ops::FnMut(&&String) -> bool) {
+#[allow(dead_code)]
+fn matches_regexp(regexp: &str) -> impl std::ops::FnMut(&&String) -> bool {
     // filtro
     let re = Regex::new(regexp).unwrap();
-    move |w|  re.is_match(w.as_str())
+    move |w| re.is_match(w.as_str())
 }
 
 fn sort_word(word: &str) -> Result<String, impl std::error::Error> {
     // funzione ausiliaria, utile per la is_anagram e cose simili
     // ritorna una COPIA
     // esempio: house -> ehosu
-    let mut w_bytes = word.to_string().clone().into_bytes();
+    let mut w_bytes = word.to_string().into_bytes();
     w_bytes.sort();
     String::from_utf8(w_bytes)
 }
 
-fn is_anagram(word: &str) -> (impl std::ops::FnMut(&&String) -> bool) {
+fn is_anagram(word: &str) -> impl std::ops::FnMut(&&String) -> bool {
     // filtro
-    let sorted_word = sort_word(line_to_word(word.to_string()).as_str()).unwrap();
-    move |w| {
-        sorted_word == sort_word(w.as_str()).unwrap()
-    }
+    let sorted_word = sort_word(line_to_word(word).as_str()).unwrap();
+    move |w| sorted_word == sort_word(w.as_str()).unwrap()
 }
 
 // filtri }}}