[css-color-4][editorial] html validity

Author: svgeesus

css-color-4/Overview.bs

@@ -6796,7 +6796,7 @@ Serializing sRGB values</h3>
 	<div class="example" id="ex-canvas-srgb">
 		For example, fill style is set to <span class="swatch" style="--color: rgb(255, 0, 255)"></span> magenta:
 
-		<pre lang-js>
+		<pre class="lang-js">
 			context.fillStyle = "rgb(255, 0, 255)"
 			console.log(context.fillStyle); // "#ff00ff"
 		</pre>
@@ -6813,7 +6813,7 @@ Serializing sRGB values</h3>
 	<div class="example" id="ex-canvas-p3">
 		For example, fill style is set to <span class="swatch" style="--color: rgb(48.63% 13.85% 15.73%)"></span>  a dark brown, in CIE Lab:
 
-		<pre lang-js>
+		<pre class="lang-js">
 			context.fillStyle = "lab(29% 39 20)";
 			console.log(context.fillStyle); // "lab(29 39 20)"
 		</pre>
@@ -6824,7 +6824,7 @@ Serializing sRGB values</h3>
 	<div class="example" id="ex-srgb-alpha">
 		For example, fill style is set to <span class="swatch" style="--color: #ff00ffed"></span> semi-transparent magenta:
 
-		<pre lang-js>
+		<pre class="lang-js">
 			context.fillStyle = "#ff00ffed";
 			console.log(context.fillStyle); // "rgba(255, 0, 255, 0.93)"
 		</pre>
@@ -6837,7 +6837,7 @@ Serializing sRGB values</h3>
 		For example, a color picker has returned the following values, 
 		in the sRGB color space:
 
-		<pre lang-js>
+		<pre class="lang-js">
 			[37, 164, 87, 237]
 		</pre>