[css-color-4] Correct bug in GMA, #7135

Author: svgeesus

css-color-4/Overview.bs

@@ -5575,7 +5575,7 @@ Sample Pseudocode for the Binary Search Gamut Mapping Algorithm with Local MINDE
 							<li>set |E| to delta(|clipped|, |current|)</li>
 							<li>if |E| < |JND|
 							<ol>
-								<li>if (|E| - |JND| < |epsilon|) return |clipped| as the gamut mapped color</li>
+								<li>if (|JND| - |E| < |epsilon|) return |clipped| as the gamut mapped color</li>
 								<li>otherwise,
 								<ol>
 									<li>set |min_inGamut| to false</li>
@@ -5589,6 +5589,7 @@ Sample Pseudocode for the Binary Search Gamut Mapping Algorithm with Local MINDE
 					</li>
 				</ol>
 			</li>
+			<li>return |current| as the gamut mapped color</li>
 		</ol>