[css-display-3] Try to unconfuse name of a fieldset by using more expository wording. #1584

Author: fantasai

css-display-3/Overview.bs

@@ -605,7 +605,7 @@ Box Generation: the ''display/none'' and ''display/contents'' keywords</h3>
 		although they may affect which table cell <em>appears</em> in a column,
 		they do not affect which table cell is associated with a particular column <em>element</em>.
 		Similarly, they cannot affect which HTML <{summary}> element is associated with a particular table
-		or whether a <{legend}> is the name of a <{fieldset}>.
+		or whether a <{legend}> is considered to be labelling the contents of a particular <{fieldset}>.
 	</span>
 
 <h3 id='legacy-display'>