2 files changed, 4 insertions, 4 deletions
diff --git a/compiler/rustc_graphviz/src/lib.rs b/compiler/rustc_graphviz/src/lib.rs
index 27390fd2e4d..e318090ebe1 100644
--- a/compiler/rustc_graphviz/src/lib.rs
+++ b/compiler/rustc_graphviz/src/lib.rs
@@ -472,7 +472,7 @@ pub trait Labeller<'a> {
 /// Escape tags in such a way that it is suitable for inclusion in a
 /// Graphviz HTML label.
 pub fn escape_html(s: &str) -> String {
-    s.replace("&", "&amp;").replace("\"", "&quot;").replace("<", "&lt;").replace(">", "&gt;")
+    s.replace('&', "&amp;").replace('\"', "&quot;").replace('<', "&lt;").replace('>', "&gt;")
 }
 
 impl<'a> LabelText<'a> {
@@ -659,7 +659,7 @@ where
         }
 
         writeln!(text, ";").unwrap();
-        w.write_all(&text[..])?;
+        w.write_all(&text)?;
 
         text.clear();
     }
@@ -684,7 +684,7 @@ where
         }
 
         writeln!(text, ";").unwrap();
-        w.write_all(&text[..])?;
+        w.write_all(&text)?;
 
         text.clear();
     }
diff --git a/compiler/rustc_graphviz/src/tests.rs b/compiler/rustc_graphviz/src/tests.rs
index a297bac86c4..154bae4cb05 100644
--- a/compiler/rustc_graphviz/src/tests.rs
+++ b/compiler/rustc_graphviz/src/tests.rs
@@ -56,7 +56,7 @@ impl NodeLabels<&'static str> {
         match self {
             UnlabelledNodes(len) => vec![None; len],
             AllNodesLabelled(lbls) => lbls.into_iter().map(Some).collect(),
-            SomeNodesLabelled(lbls) => lbls.into_iter().collect(),
+            SomeNodesLabelled(lbls) => lbls,
         }
     }