rustdoc: simplify example-line-numbers CSS selector

Author: notriddle

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

@@ -578,7 +578,7 @@ h2.location a {
 	position: relative;
 }
 
-.example-wrap > pre.example-line-numbers {
+pre.example-line-numbers {
 	overflow: initial;
 	border: 1px solid;
 	padding: 13px 8px;

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

@@ -190,7 +190,7 @@ pre.rust .attribute {
 	color: #e6e1cf;
 }
 
-.example-wrap > pre.example-line-numbers {
+pre.example-line-numbers {
 	color: #5c67736e;
 	border: none;
 }

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

@@ -155,7 +155,7 @@ pre.rust .question-mark {
 	color: #ff9011;
 }
 
-.example-wrap > pre.example-line-numbers {
+pre.example-line-numbers {
 	border-color: #4a4949;
 }
 

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

@@ -141,7 +141,7 @@ pre.rust .question-mark {
 	color: #ff9011;
 }
 
-.example-wrap > pre.example-line-numbers {
+pre.example-line-numbers {
 	border-color: #c7c7c7;
 }