[css-tables] Fix #1590 (generate anon inline-table in ruby not table)

Author: FremyCompany

css-tables-3/Overview.bs

@@ -384,7 +384,7 @@ spec:css22; type:property; text:display
 						<li>An anonymous <a>table</a> or <a>inline-table</a> box must be generated
 							around each sequence of consecutive <a>proper table child</a> boxes
 							which are misparented.
-							If the box's parent is an inline box,
+							If the box's parent is an inline, run-in, or ruby box (or any box that would perform inlinification of its children),
 								then an <a>inline-table</a> box must be generated;
 								otherwise it must be a <a>table</a> box.
 							<ul>