✨ feat: fix code for clippy suggestions

src/config_parser/parser.rs

@@ -79,7 +79,7 @@ impl Config {
                 upstream_search_engines: globals
                     .get::<_, HashMap<String, bool>>("upstream_search_engines")?
                     .into_iter()
-                    .filter_map(|(key, value)| value.then(|| key))
+                    .filter_map(|(key, value)| value.then_some(key))
                     .collect(),
             })
         })

src/engines/duckduckgo.rs

@@ -89,7 +89,7 @@ impl SearchEngine for DuckDuckGo {
         );
 
         let document: Html = Html::parse_document(
-            &DuckDuckGo::fetch_html_from_upstream(&self, url, header_map).await?,
+            &DuckDuckGo::fetch_html_from_upstream(self, url, header_map).await?,
         );
 
         let no_result: Selector = Selector::parse(".no-results")

src/engines/searx.rs

@@ -69,7 +69,7 @@ impl SearchEngine for Searx {
         header_map.insert(COOKIE, "categories=general; language=auto; locale=en; autocomplete=duckduckgo; image_proxy=1; method=POST; safesearch=2; theme=simple; results_on_new_tab=1; doi_resolver=oadoi.org; simple_style=auto; center_alignment=1; query_in_title=1; infinite_scroll=0; disabled_engines=; enabled_engines=\"archive is__general\\054yep__general\\054curlie__general\\054currency__general\\054ddg definitions__general\\054wikidata__general\\054duckduckgo__general\\054tineye__general\\054lingva__general\\054startpage__general\\054yahoo__general\\054wiby__general\\054marginalia__general\\054alexandria__general\\054wikibooks__general\\054wikiquote__general\\054wikisource__general\\054wikiversity__general\\054wikivoyage__general\\054dictzone__general\\054seznam__general\\054mojeek__general\\054naver__general\\054wikimini__general\\054brave__general\\054petalsearch__general\\054goo__general\"; disabled_plugins=; enabled_plugins=\"searx.plugins.hostname_replace\\054searx.plugins.oa_doi_rewrite\\054searx.plugins.vim_hotkeys\"; tokens=; maintab=on; enginetab=on".parse().into_report().change_context(EngineError::UnexpectedError)?);
 
         let document: Html =
-            Html::parse_document(&Searx::fetch_html_from_upstream(&self, url, header_map).await?);
+            Html::parse_document(&Searx::fetch_html_from_upstream(self, url, header_map).await?);
 
         let no_result: Selector = Selector::parse("#urls>.dialog-error>p")
             .map_err(|_| Report::new(EngineError::UnexpectedError))