fix review

1 files changed, 3 insertions, 5 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/specialize/mod.rs b/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
index 9759ab8a8a6..264cc4f248c 100644
--- a/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
@@ -349,7 +349,7 @@ fn report_negative_positive_conflict(
         E0751,
         "found both positive and negative implementation of trait `{}`{}:",
         overlap.trait_desc,
-        overlap.self_desc.clone().map_or_else(|| String::new(), |ty| format!(" for type `{}`", ty))
+        overlap.self_desc.clone().map_or_else(String::new, |ty| format!(" for type `{}`", ty))
     );
 
     match tcx.span_of_impl(negative_impl_def_id) {
@@ -400,7 +400,7 @@ fn report_conflicting_impls(
             overlap
                 .self_desc
                 .clone()
-                .map_or_else(|| String::new(), |ty| { format!(" for type `{}`", ty) }),
+                .map_or_else(String::new, |ty| { format!(" for type `{}`", ty) }),
             match used_to_be_allowed {
                 Some(FutureCompatOverlapErrorKind::Issue33140) => " (E0119)",
                 _ => "",
@@ -418,9 +418,7 @@ fn report_conflicting_impls(
                     impl_span,
                     format!(
                         "conflicting implementation{}",
-                        overlap
-                            .self_desc
-                            .map_or_else(|| String::new(), |ty| format!(" for `{}`", ty))
+                        overlap.self_desc.map_or_else(String::new, |ty| format!(" for `{}`", ty))
                     ),
                 );
             }