[css-align-3] Suppress gaps at fragmentation breaks. w3c#11520

Author: fantasai

css-align-3/Overview.bs

@@ -2104,6 +2104,9 @@ Row and Column Gutters: the 'row-gap' and 'column-gap' properties</h3>
 			See [[css-grid-1#gutters]] for precise details.
 	</dl>
 
+	In all cases, the [=gutter=] disappears when it coincides with
+	a [=fragmentation break=]. [[CSS-BREAK-3]]
+
 	Note: Table boxes do not use the 'gap' properties
 	to specify separation between their cells.
 	Instead, they use the 'border-spacing' property,