fix quoting

Author: svgeesus

css-color-4/Overview.bs

@@ -2363,7 +2363,7 @@ Converting predefined colorspaces to Lab</h4>
 	<ol>
 		<li>Convert from gamma-corrected RGB to linear-light RGB (undo gamma encoding)
 		<li>Convert from linear RGB to CIE XYZ
-		<li>Convert from a D65 whitepoint (used by sRGB, ''display-p3''', ''a98-rgb''' and ''rec2020''') to the D50 whitepoint used in Lab,
+		<li>Convert from a D65 whitepoint (used by sRGB, ''display-p3'', ''a98-rgb'' and ''rec2020'') to the D50 whitepoint used in Lab,
 			with the Bradford transform. ''prophoto-rgb''' already has a D50 whitepoint.
 		<li>Convert D50-adapted XYZ to Lab
 	</ol>