[css-color-4][editorial] silence bikeshed warnings about variables only used once.

Author: svgeesus

css-color-4/Overview.bs

@@ -14,7 +14,7 @@ Editor: Tab Atkins Jr., Google, http://xanthir.com/contact, w3cid 42199
 Editor: Chris Lilley, W3C, https://svgees.us/, w3cid 1438
 Editor: Lea Verou, Invited Expert, http://lea.verou.me/, w3cid 52258
 Former Editor: L. David Baron, Google https://www.google.com/, https://dbaron.org/, w3cid 15393
-Abstract: This specification describes CSS <<color>> values, and properties for foreground color and group opacity.
+Abstract: This specification describes CSS <<color>> values, and properties for foreground color and group opacity. It also describes how colors are interpolated, and how to gamut map colors.
 Repository: w3c/csswg-drafts
 Ignored Terms: double, octet
 Complain About: missing-example-ids true
@@ -6109,7 +6109,7 @@ Sample Pseudocode for the Ray Trace Gamut Mapping</h4>
 								</li>
 							</ul>
 						</li>
-						<li><b>Cast a ray</b> from |anchor| to |origin_rgb|
+						<li><b>Cast a ray</b> from |start| = |anchor| to |end| = |origin_rgb|
 							and let |intersection| be 
 							the intersection of this ray 
 							with the gamut boundary
@@ -6154,18 +6154,18 @@ Sample Pseudocode for the Ray Trace Gamut Mapping</h4>
 		<li>let |direction| be a 3-element array</li>
 		<li>for (i = 0; i < 3; i++): 
 			<ul>
-				<li>let |a| be |start|<i>[i]</i></li>
-				<li>let |b| be |end|<i>[i]</i></li>
+				<li>let |a| be |start| <i>[i]</i></li>
+				<li>let |b| be |end| <i>[i]</i></li>
 				<li>let |d| be |b| - |a|</li>
-				<li>let |direction|<i>[i]</i> be |d|</li>
+				<li>let |direction| <i>[i]</i> be |d|</li>
 				<!--  Non parallel cases -->
 				<li>if abs(|d|) < 1E-12
 					<ul>
 						<li>let |inv_d| be 1 / |d|</li>
-						<li>let |t1| be (|bmin|<i>[i]</i> - |a|) * |inv_d|</li>
-						<li>let |t2| be (|bmax|<i>[i]</i> - |a|) * |inv_d|</li>
-						<li>let |tnear| be max(min(|t1|, |t2|), |tnear|)</li>
-						<li>let |tfar| be min(max(|t1|, |t2|), |tfar|)</li>
+						<li>let |t1| be (|bmin| <i>[i]</i> - |a| ) * |inv_d| </li>
+						<li>let |t2| be (|bmax| <i>[i]</i> - |a| ) * |inv_d| </li>
+						<li>let |tnear| be max(min(|t1|, |t2|), |tnear| )</li>
+						<li>let |tfar| be min(max(|t1|, |t2|), |tfar| )</li>
 					</ul>
 				</li>
 				<!-- Impossible parallel case -->
@@ -6196,7 +6196,7 @@ Sample Pseudocode for the Ray Trace Gamut Mapping</h4>
 		</li>
 		<li>for (i =0; i &lt; 3; i++):
 			<ul>
-				<li>let |result|<i>[i]</i> be |start|<i>[i]</i> + |direction|<i>[i]</i> * |tnear|</li>
+				<li>let |result| <i>[i]</i> be |start| <i>[i]</i> + |direction| <i>[i]</i> * |tnear| </li>
 			</ul>
 		</li>
 		<li>return |result|</li>
@@ -6214,7 +6214,7 @@ Sample Pseudocode for the Ray Trace Gamut Mapping</h4>
 			1.0 represents the maximum in-gamut channel value,
 			and it is assumed all channels have the same maximum.</li>
 		<li id="raytrace-footnote-3">
-			This places the current color back on the chroma reduction curve,
+			This places the |current| color back on the chroma reduction curve,
 			if it has deviated.</li>
 		<li id="raytrace-footnote-4">
 			This means |origin_rgb| is below the gamut surface, 
@@ -6231,7 +6231,7 @@ Sample Pseudocode for the Ray Trace Gamut Mapping</h4>
 			this simplifies to a single constant
 			rather than a 3-element array.</li>
 		<li id="raytrace-footnote-7">
-			favoring the first intersection in the direction |start| -> |end|.
+			favoring the first intersection in the direction |start| -> |end| .
 	</ol>
 
 </div>
@@ -7789,8 +7789,9 @@ Changes</h2>
 
 <ul>
 	<!-- to 27 Feb 2026 -->
+	<li>Updated abstract to mention color interpolation and gamut mapping.</li>
 	<li>Clarified wording regarding the aims of CSS gamut mapping</li>
-	<li>Corrected ray trace algorithm to not overwrite |end|
+	<li>Corrected ray trace algorithm to not overwrite <i>end</i>
 		(<a href="https://github.com/w3c/csswg-drafts/issues/10579">Issue 10579</a>)
 	</li>
 	<li>Added pseudocode for the ray trace gamut mapping algorithm