[css-color-4][editorial] fix markup

Author: tabatkins

css-color-4/Overview.bs

@@ -1047,7 +1047,7 @@ any achromatic color will have a [=powerless=] hue component.
 	otherwise,
 	it represents that component as being the ''none'' keyword.
 
-	<div class=example id="ex-missing-hue" class="non-normative">
+	<div class="example non-normative" id="ex-missing-hue">
 		A missing hue is common when interpolating in cylindrical color spaces.
 		For example, using the ''color-mix()'' function specified in [[CSS-COLOR-5]]
 		one could write ''color-mix(in hsl, white 30%, green 70%)''.
@@ -1960,7 +1960,7 @@ The ''<color>/currentcolor'' keyword</h3>
 			&lt;/style>
 		</pre>
 
-		<p><img src="images/text-emphasis.png" width="495" height="119" alt="rendered emphasized text with the word 'really' in red with red emphasis dots"/></p>
+		<p><img src="images/text-emphasis.png" width="495" height="119" alt="rendered emphasized text with the word 'really' in red with red emphasis dots"></p>
 
 		In the above example, the emphasis marks are black over the text "Some" and "emphasized text",
 		but red over the text "really".
@@ -2933,7 +2933,7 @@ Device-independent Colors: CIE Lab and LCH, Oklab and Oklch</h2>
 	<em>This section is not normative.</em>
 
 	Physical measurements of a color are typically expressed in the CIE L*a*b* [[!CIELAB]] color space,
-	created in 1976 by the <abbr title='Commission Internationale de l'Eclairage'>CIE</abbr>
+	created in 1976 by the <abbr title="Commission Internationale de l'Eclairage">CIE</abbr>
 	and commonly referred to simply as Lab.
 	Color conversions from one device to another may also use Lab as an intermediate step.
 	Derived from human vision experiments,