Rollup merge of #115752 - GuillaumeGomez:aliased-type-title, r=notriddle

rustdoc: Add missing "Aliased type" title in the sidebar

Follow-up of #115682.

The sections title are supposed to be present in the sidebar, we forgot to put this one so I added it into it. I also added the missing newly created `aliased-type` ID into the `DEFAULT_ID_MAP`.

r? `@notriddle`

src/librustdoc/html/markdown.rs

@@ -1609,6 +1609,7 @@ fn init_id_map() -> FxHashMap<Cow<'static, str>, usize> {
     map.insert("blanket-implementations-list".into(), 1);
     map.insert("deref-methods".into(), 1);
     map.insert("layout".into(), 1);
+    map.insert("aliased-type".into(), 1);
     map
 }
 

src/librustdoc/html/render/sidebar.rs

@@ -237,6 +237,7 @@ fn sidebar_type_alias<'a>(
 ) -> Vec<LinkBlock<'a>> {
     let mut items = vec![];
     if let Some(inner_type) = &t.inner_type {
+        items.push(LinkBlock::forced(Link::new("aliased-type", "Aliased type")));
         match inner_type {
             clean::TypeAliasInnerType::Enum { variants, is_non_exhaustive: _ } => {
                 let mut variants = variants

tests/rustdoc/issue-32077-type-alias-impls.rs

@@ -19,6 +19,8 @@ impl<T> Foo for GenericStruct<T> {}
 impl Bar for GenericStruct<u32> {}
 
 // @has 'foo/type.TypedefStruct.html'
+// We check that "Aliased type" is also present as a title in the sidebar.
+// @has - '//*[@class="sidebar-elems"]//h3/a[@href="#aliased-type"]' 'Aliased type'
 // We check that we have the implementation of the type alias itself.
 // @has - '//*[@id="impl-TypedefStruct"]/h3' 'impl TypedefStruct'
 // @has - '//*[@id="method.on_alias"]/h4' 'pub fn on_alias()'