[css-tables] Made it more clear what (if any) means. Fixes #467

Author: Greg Whitworth

css-tables-3/Overview.bs

@@ -296,13 +296,13 @@ spec:css21; type:property; text:max-width
 							are between two immediate siblings each of which is a <a>table-non-root</a> box,
 							are treated as if they had <code>display: none</code>.
 
-						<li>Anonymous inline boxes which contain only white space,
-							are the first and/or last child of a <a>tabular container</a>,
-							and whose immediate sibling (if any) is a <a>table-non-root</a> box,
-							are treated as if they had <code>display: none</code>.
-
-							ISSUE(467): Fixup collapsible whitespace
-
+						<li>Anonymous inline boxes which meet all of the following criteria
+						    are treated as though they had <code>display: none</code>.
+							<ul>
+								<li>contains only white space
+								<li>are the first and/or last child of a <a>tabular container</a>
+								<li>whose immediate sibling, if it has any siblings at all, is a <a>table-non-root</a> box
+							</ul>
 					</ol>
 				</li>
 				<li><b>Generate missing child wrappers:</b>