[css-align-3][css-sizing-3] Cross-link percentage handling of gaps. #4664

Author: fantasai

css-align-3/Overview.bs

@@ -1956,7 +1956,7 @@ Row and Column Gutters: the 'row-gap' and 'column-gap' properties</h3>
 
 			Negative values are invalid.
 			<a href="https://www.w3.org/TR/css-sizing-3/#percentage-sizing">As in the min size properties and margins/paddings</a> [[CSS-SIZING-3]],
-			percentages resolve against zero
+			[=cyclic percentages=] resolve against zero
 			for determining intrinsic size contributions,
 			but resolve against the box’s content box
 			when laying out the box’s contents.

css-sizing-3/Overview.bs

@@ -1050,7 +1050,8 @@ Extrinsic Size Determination</h2>
 
 		<li id=min-percentage-contribution>
 		For the [=min size properties=],
-		as well as for margins and paddings,
+		as well as for [=margins=] and [=paddings=]
+		(and [=gutters=]),
 		a <a>cyclic percentage</a> is resolved against zero
 		for determining intrinsic size contributions.
 	</ol>