more clippy::complexity fixes

      redundant_guards
      redundant_slicing
      filter_next
      needless_borrowed_reference
      useless_format

2 files changed, 2 insertions, 3 deletions

diff --git a/compiler/rustc_trait_selection/src/infer.rs b/compiler/rustc_trait_selection/src/infer.rs
index 4b11cc3ace9..251f0628a71 100644
--- a/compiler/rustc_trait_selection/src/infer.rs
+++ b/compiler/rustc_trait_selection/src/infer.rs
@@ -101,11 +101,10 @@ impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
                         self.tcx.impl_trait_ref(impl_def_id).map(|r| (impl_def_id, r))
                     })
                     .map(|(impl_def_id, imp)| (impl_def_id, imp.skip_binder()))
-                    .filter(|(_, imp)| match imp.self_ty().peel_refs().kind() {
+                    .find(|(_, imp)| match imp.self_ty().peel_refs().kind() {
                         ty::Adt(i_def, _) if i_def.did() == def.did() => true,
                         _ => false,
                     })
-                    .next()
             {
                 let mut fulfill_cx = FulfillmentCtxt::new(self);
                 // We get all obligations from the impl to talk about specific
diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
index f7e8dc62a62..1033fe68140 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@@ -2167,7 +2167,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
             })
             .collect();
         err.multipart_suggestion(
-            format!("consider wrapping the function in a closure"),
+            "consider wrapping the function in a closure",
             vec![
                 (arg.span.shrink_to_lo(), format!("|{}| ", closure_names.join(", "))),
                 (arg.span.shrink_to_hi(), format!("({})", call_names.join(", "))),