[css-display] Clarify that run-in sequences can grow as you recurse. Fixes #1639.

tabatkins · tabatkins · commit ef3c8fd8b2fe · 2018-03-19T14:16:22.000-07:00
diff --git a/css-display-3/Overview.bs b/css-display-3/Overview.bs
@@ -780,7 +780,8 @@ Run-In Layout</h2>
 			(including the box generated by the ''::before'' pseudo-element, if any).
 			This step recurses if possible
 			(so that the run-in effectively becomes
-			part of the deepest subsequent “paragraph” in its formatting context).
+			part of the deepest subsequent “paragraph” in its formatting context,
+			collecting newly-adjacent run-ins as it goes).
 
 			The reparented content is then formatted as if originally parented there.
 			<span class='note'>Note that only layout is affected, not inheritance,
