rustdoc: rename syntax highlighting CSS class attribute to attr

Link classes use the abbreviation `attr`, so why shouldn't
syntax highlighting?

Author: notriddle

Diff for: src/librustdoc/html/highlight.rs

@@ -362,7 +362,7 @@ impl Class {
         match self {
             Class::Comment => "comment",
             Class::DocComment => "doccomment",
-            Class::Attribute => "attribute",
+            Class::Attribute => "attr",
             Class::KeyWord => "kw",
             Class::RefKeyWord => "kw-2",
             Class::Self_(_) => "self",

Diff for: src/librustdoc/html/highlight/fixtures/sample.html

@@ -3,16 +3,16 @@
 .kw { color: #8959A8; }
 .kw-2, .prelude-ty { color: #4271AE; }
 .number, .string { color: #718C00; }
-.self, .bool-val, .prelude-val, .attribute, .attribute .ident { color: #C82829; }
+.self, .bool-val, .prelude-val, .attr, .attr .ident { color: #C82829; }
 .macro, .macro-nonterminal { color: #3E999F; }
 .lifetime { color: #B76514; }
 .question-mark { color: #ff9011; }
 </style>
-<pre><code><span class="attribute">#![crate_type = <span class="string">&quot;lib&quot;</span>]
+<pre><code><span class="attr">#![crate_type = <span class="string">&quot;lib&quot;</span>]
 
 </span><span class="kw">use </span>std::path::{Path, PathBuf};
 
-<span class="attribute">#[cfg(target_os = <span class="string">&quot;linux&quot;</span>)]
+<span class="attr">#[cfg(target_os = <span class="string">&quot;linux&quot;</span>)]
 #[cfg(target_os = <span class="string">&quot;windows&quot;</span>)]
 </span><span class="kw">fn </span>main() -&gt; () {
     <span class="kw">let </span>foo = <span class="bool-val">true </span>&amp;&amp; <span class="bool-val">false </span>|| <span class="bool-val">true</span>;
@@ -23,7 +23,7 @@
     <span class="macro">mac!</span>(foo, <span class="kw-2">&amp;mut </span>bar);
     <span class="macro">assert!</span>(<span class="self">self</span>.length &lt; N &amp;&amp; index &lt;= <span class="self">self</span>.length);
     ::std::env::var(<span class="string">&quot;gateau&quot;</span>).is_ok();
-    <span class="attribute">#[rustfmt::skip]
+    <span class="attr">#[rustfmt::skip]
     </span><span class="kw">let </span>s:std::path::PathBuf = std::path::PathBuf::new();
     <span class="kw">let </span><span class="kw-2">mut </span>s = String::new();
 

Diff for: src/librustdoc/html/highlight/tests.rs

@@ -9,7 +9,7 @@ const STYLE: &str = r#"
 .kw { color: #8959A8; }
 .kw-2, .prelude-ty { color: #4271AE; }
 .number, .string { color: #718C00; }
-.self, .bool-val, .prelude-val, .attribute, .attribute .ident { color: #C82829; }
+.self, .bool-val, .prelude-val, .attr, .attr .ident { color: #C82829; }
 .macro, .macro-nonterminal { color: #3E999F; }
 .lifetime { color: #B76514; }
 .question-mark { color: #ff9011; }

Diff for: src/librustdoc/html/static/css/rustdoc.css

@@ -1092,7 +1092,7 @@ pre.rust .bool-val {
 pre.rust .self {
 	color: var(--code-highlight-self-color);
 }
-pre.rust .attribute {
+pre.rust .attr {
 	color: var(--code-highlight-attribute-color);
 }
 pre.rust .macro,

Diff for: src/test/rustdoc-gui/highlight-colors.goml

@@ -15,7 +15,7 @@ define-function: (
         string,
         bool_val,
         self,
-        attribute,
+        attr,
         macro,
         question_mark,
         comment,
@@ -33,7 +33,7 @@ define-function: (
         ("assert-css", ("pre.rust .string", {"color": |string|}, ALL)),
         ("assert-css", ("pre.rust .bool-val", {"color": |bool_val|}, ALL)),
         ("assert-css", ("pre.rust .self", {"color": |self|}, ALL)),
-        ("assert-css", ("pre.rust .attribute", {"color": |attribute|}, ALL)),
+        ("assert-css", ("pre.rust .attr", {"color": |attr|}, ALL)),
         ("assert-css", ("pre.rust .macro", {"color": |macro|}, ALL)),
         ("assert-css", ("pre.rust .question-mark", {"color": |question_mark|}, ALL)),
         ("assert-css", ("pre.rust .comment", {"color": |comment|}, ALL)),
@@ -52,7 +52,7 @@ call-function: ("check-colors", {
     "string": "rgb(184, 204, 82)",
     "bool_val": "rgb(255, 119, 51)",
     "self": "rgb(54, 163, 217)",
-    "attribute": "rgb(230, 225, 207)",
+    "attr": "rgb(230, 225, 207)",
     "macro": "rgb(163, 122, 204)",
     "question_mark": "rgb(255, 144, 17)",
     "comment": "rgb(120, 135, 151)",
@@ -69,7 +69,7 @@ call-function: ("check-colors", {
     "string": "rgb(131, 163, 0)",
     "bool_val": "rgb(238, 104, 104)",
     "self": "rgb(238, 104, 104)",
-    "attribute": "rgb(238, 104, 104)",
+    "attr": "rgb(238, 104, 104)",
     "macro": "rgb(62, 153, 159)",
     "question_mark": "rgb(255, 144, 17)",
     "comment": "rgb(141, 141, 139)",
@@ -86,7 +86,7 @@ call-function: ("check-colors", {
     "string": "rgb(113, 140, 0)",
     "bool_val": "rgb(200, 40, 41)",
     "self": "rgb(200, 40, 41)",
-    "attribute": "rgb(200, 40, 41)",
+    "attr": "rgb(200, 40, 41)",
     "macro": "rgb(62, 153, 159)",
     "question_mark": "rgb(255, 144, 17)",
     "comment": "rgb(142, 144, 140)",

Diff for: src/test/rustdoc/issue-41783.codeblock.html

@@ -1,5 +1,5 @@
 <code># single
 ## double
 ### triple
-<span class="attribute">#[outer]
+<span class="attr">#[outer]
 #![inner]</span></code>

Diff for: src/test/rustdoc/issue-41783.rs

@@ -1,10 +1,10 @@
 // @has issue_41783/struct.Foo.html
 // @!hasraw - 'space'
 // @!hasraw - 'comment'
-// @hasraw - '<span class="attribute">#[outer]'
-// @!hasraw - '<span class="attribute">#[outer]</span>'
+// @hasraw - '<span class="attr">#[outer]'
+// @!hasraw - '<span class="attr">#[outer]</span>'
 // @hasraw - '#![inner]</span>'
-// @!hasraw - '<span class="attribute">#![inner]</span>'
+// @!hasraw - '<span class="attr">#![inner]</span>'
 // @snapshot 'codeblock' - '//*[@class="rustdoc-toggle top-doc"]/*[@class="docblock"]//pre/code'
 
 /// ```no_run