[css-color-hdr][editorial] typos, correct bikeshed syntax

Author: svgeesus

css-color-hdr-1/Overview.bs

@@ -46,7 +46,7 @@ WPT Display: open
 			"publisher": "VESA",
 			"date": "17 May 2024"
 		},
-		"ISO 21496-1": {
+		"ISO_21496-1": {
 			"title": "Gain map metadata for image conversion: Part 1: Dynamic Range Conversion",
 			"href": "https://www.iso.org/standard/86775.html",
 			"publisher": "ISO"
@@ -465,17 +465,19 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 	The actual value is computed by interpolating between these two colors,
 	based on the current amount of HDR headroom.
 
-	This is a similar meachanism to gain maps, 
-	in raster images conforming to [[?ISO 21496-1]].
-	
-	The actual calculated result is not exposed, 
+	<div class="informative">
+	This is a similar mechanism to gain maps, 
+	in raster images conforming to [[ISO_21496-1]].
+	</div>
+
+	The actual calculated color is not exposed, 
 	nor is the actual HDR headroom,
 	as this is a fingerprinting vector.
 
 	Its syntax is as follows:
 
 	<pre class='prod'>
-		<dfn>hdr-color()</dfn> = color-hdr([ <<color>> && <<number [1,infty]>>? ]#{2})
+		<dfn>hdr-color()</dfn> = color-hdr([ <<color>> && <<number [1,infinity]>>? ]#{2})
 	</pre>