Remove `String` allocation in loop

diff --git a/src/librustdoc/html/format.rs b/src/librustdoc/html/format.rs
index 3a2effa625cf364333d293cf140a499f91b2b136..7f21968f9d526ec16a5d13dd7c400021049641c2 100644 (file)
--- a/src/librustdoc/html/format.rs
+++ b/src/librustdoc/html/format.rs
@@ -141,9 +141,7 @@ fn comma_sep<T: fmt::Display>(items: impl Iterator<Item = T>) -> impl fmt::Displ
     display_fn(move |f| {
         let mut bounds_dup = FxHashSet::default();
 
-        for (i, bound) in
-            bounds.iter().filter(|b| bounds_dup.insert(b.print(cx).to_string())).enumerate()
-        {
+        for (i, bound) in bounds.iter().filter(|b| bounds_dup.insert(b.clone())).enumerate() {
             if i > 0 {
                 f.write_str(" + ")?;
             }