Rollup merge of rust-lang#59855 - GuillaumeGomez:fix-attr-position-in-type-decl, r=QuietMisdreavus

Fix attributes position in type declaration

Fixes rust-lang#59797.

r? @rust-lang/rustdoc

Author: Centril

src/librustdoc/html/render.rs

@@ -3136,23 +3136,20 @@ fn item_trait(
             // FIXME: we should be using a derived_id for the Anchors here
             write!(w, "{{\n")?;
             for t in &types {
-                write!(w, "    ")?;
                 render_assoc_item(w, t, AssocItemLink::Anchor(None), ItemType::Trait)?;
                 write!(w, ";\n")?;
             }
             if !types.is_empty() && !consts.is_empty() {
                 w.write_str("\n")?;
             }
             for t in &consts {
-                write!(w, "    ")?;
                 render_assoc_item(w, t, AssocItemLink::Anchor(None), ItemType::Trait)?;
                 write!(w, ";\n")?;
             }
             if !consts.is_empty() && !required.is_empty() {
                 w.write_str("\n")?;
             }
             for (pos, m) in required.iter().enumerate() {
-                write!(w, "    ")?;
                 render_assoc_item(w, m, AssocItemLink::Anchor(None), ItemType::Trait)?;
                 write!(w, ";\n")?;
 
@@ -3164,7 +3161,6 @@ fn item_trait(
                 w.write_str("\n")?;
             }
             for (pos, m) in provided.iter().enumerate() {
-                write!(w, "    ")?;
                 render_assoc_item(w, m, AssocItemLink::Anchor(None), ItemType::Trait)?;
                 match m.inner {
                     clean::MethodItem(ref inner) if !inner.generics.where_predicates.is_empty() => {
@@ -3473,8 +3469,9 @@ fn render_assoc_item(w: &mut fmt::Formatter<'_>,
             (0, true)
         };
         render_attributes(w, meth)?;
-        write!(w, "{}{}{}{}{}{}fn <a href='{href}' class='fnname'>{name}</a>\
+        write!(w, "{}{}{}{}{}{}{}fn <a href='{href}' class='fnname'>{name}</a>\
                    {generics}{decl}{where_clause}",
+               if parent == ItemType::Trait { "    " } else { "" },
                VisSpace(&meth.visibility),
                ConstnessSpace(header.constness),
                UnsafetySpace(header.unsafety),
@@ -3775,7 +3772,7 @@ const ATTRIBUTE_WHITELIST: &'static [&'static str] = &[
     "non_exhaustive"
 ];
 
-fn render_attributes(w: &mut fmt::Formatter<'_>, it: &clean::Item) -> fmt::Result {
+fn render_attributes(w: &mut dyn fmt::Write, it: &clean::Item) -> fmt::Result {
     let mut attrs = String::new();
 
     for attr in &it.attrs.other_attrs {

src/librustdoc/html/static/rustdoc.css

@@ -1577,3 +1577,17 @@ div.name.expand::before {
 	left: -15px;
 	top: 2px;
 }
+
+/* This part is to fix the "Expand attributes" part in the type declaration. */
+.type-decl > pre > :first-child {
+	margin-left: 0 !important;
+}
+.type-decl > pre > :nth-child(2) {
+	margin-left: 1.8em !important;
+}
+.type-decl > pre > .toggle-attributes {
+	margin-left: 2.2em;
+}
+.type-decl > pre > .docblock.attributes {
+	margin-left: 4em;
+}