Improve hidden code lines display by changing their background to make them easier to spot

Author: GuillaumeGomez

src/librustdoc/html/highlight.rs

@@ -139,7 +139,7 @@ fn write_code(
         )
         .highlight(&mut |highlight| {
             match highlight {
-                Highlight::Token { text, class } => string(out, Escape(text), class, context_info),
+                Highlight::Token { text, class } => string(out, Escape(text), class, &context_info),
                 Highlight::EnterSpan { class } => enter_span(out, class),
                 Highlight::ExitSpan => exit_span(out),
             };

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

@@ -1257,6 +1257,11 @@ pre.rust {
 	-moz-tab-size: 4;
 }
 
+pre .data-hidden {
+	width: 100%;
+	display: block;
+}
+
 .search-failed {
 	text-align: center;
 	margin-top: 20px;

src/librustdoc/html/static/css/themes/ayu.css

@@ -57,6 +57,10 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #191f26;
 }
 
+pre .data-hidden {
+	background-color: #313942;
+}
+
 .sidebar {
 	background-color: #14191f;
 }

src/librustdoc/html/static/css/themes/dark.css

@@ -28,6 +28,10 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #2A2A2A;
 }
 
+pre .data-hidden {
+	background-color: #373636;
+}
+
 .sidebar {
 	background-color: #505050;
 }

src/librustdoc/html/static/css/themes/light.css

@@ -30,6 +30,10 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #F5F5F5;
 }
 
+pre .data-hidden {
+	background-color: #E6E4E4;
+}
+
 .sidebar {
 	background-color: #F1F1F1;
 }