[css-overflow-4] Test coverage

Author: frivoal

css-overflow-4/Overview.bs

@@ -979,12 +979,24 @@ Indicating Block-Axis Overflow: the 'block-ellipsis' property</h3>
 		had the ellipsis not been inserted get removed,
 		and the ellipsis is then inserted.
 
+		<wpt>
+			block-ellipsis-032.htm
+		</wpt>
+
 		The ellipsis is subject to the effects of the 'hanging punctuation' property.
 
+		<wpt>
+			block-ellipsis-033.htm
+		</wpt>
+
 		Note: When the ellipsis is inserted after punctuation,
 		that punctuation itself is no longer at the end of the line
 		and thus cannot [=hang=].
 
+		<wpt>
+			block-ellipsis-034.htm
+		</wpt>
+
 
 	Text <a href="https://www.w3.org/TR/css-text-3/#justification">alignment and justification</a>
 	occurs after placement,