[css-ruby-1] Define interaction of ruby anonymous box fixup and table anonymous box fixup. #1355

Author: fantasai

css-ruby-1/Overview.bs

@@ -285,6 +285,10 @@ Anonymous Ruby Box Generation</h3>
 			Similarly, any consecutive sequence of text and inline-level boxes
 			directly parented by a <i>ruby annotation container</i>
 			is wrapped in an anonymous <i>ruby annotation</i>.
+			(For this purpose, misparented <i>internal table elements</i>
+			are treated as <a>inline-level content</a>
+			since, being parented by ruby boxes,
+			they will be ultimately wrapped by an <a>inline table</a>.)
 
 			However, if an anonymous box so constructed contains only <i>white space</i>,
 			it is considered <dfn>intra-ruby white space</dfn>