rustdoc: add method spacing to trait methods

More cleanup for 8846c08, this time in trait
layouts when things are collapsed.

Author: notriddle

src/librustdoc/html/render/print_item.rs

@@ -716,7 +716,7 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
         document(&mut content, cx, m, Some(t), HeadingOffset::H5);
         let toggled = !content.is_empty();
         if toggled {
-            write!(w, "<details class=\"rustdoc-toggle\" open><summary>");
+            write!(w, "<details class=\"rustdoc-toggle method-toggle\" open><summary>");
         }
         write!(w, "<div id=\"{}\" class=\"method has-srclink\">", id);
         render_rightside(w, cx, m, t, RenderMode::Normal);

src/librustdoc/html/static/css/rustdoc.css

@@ -2011,7 +2011,8 @@ in storage.js plus the media query with (min-width: 701px)
 
 .method-toggle summary,
 .implementors-toggle summary,
-.impl {
+.impl,
+#implementors-list > .docblock {
 	margin-bottom: 0.75em;
 }
 

src/test/rustdoc/toggle-trait-fn.rs

@@ -4,12 +4,12 @@
 // summary. Trait methods with no documentation should not be wrapped.
 //
 // @has foo/trait.Foo.html
-// @has -  '//details[@class="rustdoc-toggle"]//summary//h4[@class="code-header"]' 'is_documented()'
-// @!has - '//details[@class="rustdoc-toggle"]//summary//h4[@class="code-header"]' 'not_documented()'
-// @has -  '//details[@class="rustdoc-toggle"]//*[@class="docblock"]' 'is_documented is documented'
-// @has -  '//details[@class="rustdoc-toggle"]//summary//h4[@class="code-header"]' 'is_documented_optional()'
-// @!has - '//details[@class="rustdoc-toggle"]//summary//h4[@class="code-header"]' 'not_documented_optional()'
-// @has -  '//details[@class="rustdoc-toggle"]//*[@class="docblock"]' 'is_documented_optional is documented'
+// @has -  '//details[@class="rustdoc-toggle method-toggle"]//summary//h4[@class="code-header"]' 'is_documented()'
+// @!has - '//details[@class="rustdoc-toggle method-toggle"]//summary//h4[@class="code-header"]' 'not_documented()'
+// @has -  '//details[@class="rustdoc-toggle method-toggle"]//*[@class="docblock"]' 'is_documented is documented'
+// @has -  '//details[@class="rustdoc-toggle method-toggle"]//summary//h4[@class="code-header"]' 'is_documented_optional()'
+// @!has - '//details[@class="rustdoc-toggle method-toggle"]//summary//h4[@class="code-header"]' 'not_documented_optional()'
+// @has -  '//details[@class="rustdoc-toggle method-toggle"]//*[@class="docblock"]' 'is_documented_optional is documented'
 pub trait Foo {
     fn not_documented();