Rollup merge of #91480 - jsha:fewer-colors, r=GuillaumeGomez

rustdoc: use smaller number of colors to distinguish items

This reduces visual distractions when reading method signatures.

As discussed in https://github.com/rust-lang/rust/issues/59845#issuecomment-974757191, this categorizes items into one of six colors (down from thirteen):

 - method, function (ochre `#AD7C37`)
 - trait, trait alias (dark slate blue `#6E4FC9`)
 - enum, struct, type alias, union, primitive (maroon `#AD378A`)
 - static, module, keyword, associated type, foreign type (steel blue `#3873AD`)
 - macro (green `#068000`)
 - generic params, self, Self (unmarked black `#000000`)

I slightly tweaked the actual color values so they'd have the same lightness (previously the trait color stood out much more than the others). And I made the color for links in general consistently use steel blue (previously there was a slightly different color for "search-failed").

The ayu and dark themes have been updated according to the same logic. I haven't changed any of the color values in those themes, just their assignment to types.

Demo:

https://rustdoc.crud.net/jsha/fewer-colors/std/string/struct.String.html
https://rustdoc.crud.net/jsha/fewer-colors/std/vec/struct.Vec.html
https://rustdoc.crud.net/jsha/fewer-colors/std/io/trait.Read.html
https://rustdoc.crud.net/jsha/fewer-colors/std/iter/trait.Iterator.html

2 files changed, 4 insertions, 6 deletions

diff --git a/src/test/rustdoc/assoc-item-cast.rs b/src/test/rustdoc/assoc-item-cast.rs
index 273fc62aa17..a409d64131a 100644
--- a/src/test/rustdoc/assoc-item-cast.rs
+++ b/src/test/rustdoc/assoc-item-cast.rs
@@ -1,6 +1,5 @@
 #![crate_name = "foo"]
 
-
 pub trait Expression {
     type SqlType;
 }
@@ -11,5 +10,5 @@ pub trait AsExpression<T> {
 }
 
 // @has foo/type.AsExprOf.html
-// @has - '//*[@class="rust typedef"]' 'type AsExprOf<Item, Type> = <Item as AsExpression<Type>>::Expression;'
+// @has - '//pre[@class="rust typedef"]' 'type AsExprOf<Item, Type> = <Item as AsExpression<Type>>::Expression;'
 pub type AsExprOf<Item, Type> = <Item as AsExpression<Type>>::Expression;
diff --git a/src/test/rustdoc/trait-impl-items-links-and-anchors.rs b/src/test/rustdoc/trait-impl-items-links-and-anchors.rs
index 4d25835bf08..db9adb4838e 100644
--- a/src/test/rustdoc/trait-impl-items-links-and-anchors.rs
+++ b/src/test/rustdoc/trait-impl-items-links-and-anchors.rs
@@ -6,9 +6,8 @@ pub trait MyTrait {
     fn defaulted_override(&self) {}
 }
 
-
 impl MyTrait for String {
-    // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-1"]//a[@class="type"]/@href' #associatedtype.Assoc
+    // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-1"]//a[@class="associatedtype"]/@href' #associatedtype.Assoc
     // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-1"]//a[@class="anchor"]/@href' #associatedtype.Assoc-1
     type Assoc = ();
     // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedconstant.VALUE-1"]//a[@class="constant"]/@href' #associatedconstant.VALUE
@@ -23,7 +22,7 @@ impl MyTrait for String {
 }
 
 impl MyTrait for Vec<u8> {
-    // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-2"]//a[@class="type"]/@href' #associatedtype.Assoc
+    // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-2"]//a[@class="associatedtype"]/@href' #associatedtype.Assoc
     // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-2"]//a[@class="anchor"]/@href' #associatedtype.Assoc-2
     type Assoc = ();
     // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedconstant.VALUE-2"]//a[@class="constant"]/@href' #associatedconstant.VALUE
@@ -39,7 +38,7 @@ impl MyTrait for Vec<u8> {
 
 impl MyTrait for MyStruct {
     // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-3"]//a[@class="anchor"]/@href' #associatedtype.Assoc-3
-    // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedtype.Assoc"]//a[@class="type"]/@href' trait.MyTrait.html#associatedtype.Assoc
+    // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedtype.Assoc"]//a[@class="associatedtype"]/@href' trait.MyTrait.html#associatedtype.Assoc
     // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedtype.Assoc"]//a[@class="anchor"]/@href' #associatedtype.Assoc
     type Assoc = bool;
     // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedconstant.VALUE-3"]//a[@class="anchor"]/@href' #associatedconstant.VALUE-3