Fix clippy lints

Author: GuillaumeGomez

Diff for: src/librustdoc/clean/cfg.rs

@@ -90,11 +90,11 @@ impl Cfg {
             },
             MetaItemKind::List(ref items) => {
                 let orig_len = items.len();
-                let sub_cfgs =
+                let mut sub_cfgs =
                     items.iter().filter_map(|i| Cfg::parse_nested(i, exclude).transpose());
                 let ret = match name {
-                    sym::all => sub_cfgs.fold(Ok(Cfg::True), |x, y| Ok(x? & y?)),
-                    sym::any => sub_cfgs.fold(Ok(Cfg::False), |x, y| Ok(x? | y?)),
+                    sym::all => sub_cfgs.try_fold(Cfg::True, |x, y| Ok(x & y?)),
+                    sym::any => sub_cfgs.try_fold(Cfg::False, |x, y| Ok(x | y?)),
                     sym::not => {
                         if orig_len == 1 {
                             let mut sub_cfgs = sub_cfgs.collect::<Vec<_>>();

Diff for: src/librustdoc/clean/utils.rs

@@ -320,7 +320,7 @@ pub(crate) fn name_from_pat(p: &hir::Pat<'_>) -> Symbol {
             );
             return Symbol::intern("()");
         }
-        PatKind::Guard(p, _) => return name_from_pat(&*p),
+        PatKind::Guard(p, _) => return name_from_pat(p),
         PatKind::Range(..) => return kw::Underscore,
         PatKind::Slice(begin, ref mid, end) => {
             let begin = begin.iter().map(|p| name_from_pat(p).to_string());