diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 3bf496f9d94b8..67ccf2137bf6e 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -1305,7 +1305,10 @@ fn render_impl(
         if let Some(use_absolute) = use_absolute {
             write!(
                 w,
-                "<details class=\"rustdoc-toggle implementors-toggle\"><summary><h3 id=\"{}\" class=\"impl\"{}><code class=\"in-band\">",
+                "<details class=\"rustdoc-toggle implementors-toggle\">\
+                     <summary>\
+                         <h3 id=\"{}\" class=\"impl\"{}>\
+                             <code class=\"in-band\">",
                 id, aliases
             );
             close_tags.insert_str(0, "</details>");
@@ -1331,7 +1334,10 @@ fn render_impl(
         } else {
             write!(
                 w,
-                "<details class=\"rustdoc-toggle implementors-toggle\"><summary><h3 id=\"{}\" class=\"impl\"{}><code class=\"in-band\">{}</code>",
+                "<details class=\"rustdoc-toggle implementors-toggle\">\
+                     <summary>\
+                         <h3 id=\"{}\" class=\"impl\"{}>\
+                             <code class=\"in-band\">{}</code>",
                 id,
                 aliases,
                 i.inner_impl().print(false, cx)
@@ -1347,8 +1353,7 @@ fn render_impl(
             outer_const_version,
         );
         write_srclink(cx, &i.impl_item, w);
-        w.write_str("</h3>");
-        w.write_str("</summary>");
+        w.write_str("</h3></summary>");
 
         if trait_.is_some() {
             if let Some(portability) = portability(&i.impl_item, Some(parent)) {