[css-flexbox] Clarify specified size in previous edit. w3c#1435.

Author: fantasai

css-flexbox/Overview.bs

@@ -2860,7 +2860,7 @@ Flex Item Intrinsic Size Contributions</h4>
 
 	The <strong>main-size <a>max-content contribution</a> of a <a>flex item</a></strong>
 	is the larger of its <em>outer</em> <a>max-content size</a>
-	and specified size (if that is <a>definite</a>),
+	and specified size (its 'width'/'height' as appropriate, if that is <a>definite</a>),
 	clamped by its <a>flex base size</a> as a maximum (if it is not growable)
 	and/or as a minimum (if it is not shrinkable),
 	and then further clamped by its <a lt="min main size property">min</a>/<a>max main size properties</a>.
@@ -3476,7 +3476,7 @@ Substantive Changes and Bugfixes</h4>
 			<blockquote>
 				<p>The <strong>main-size <a>max-content contribution</a> of a <a>flex item</a></strong>
 				is <ins>the larger of</ins> its <em>outer</em> <a>max-content size</a>
-				<ins>and specified size (if that is <a>definite</a>)</ins>,
+				<ins>and specified size (its 'width'/'height' as appropriate, if that is <a>definite</a>)</ins>,
 				clamped by its <a>flex base size</a> as a maximum (if it is not growable)
 				and/or as a minimum (if it is not shrinkable),
 				and then further clamped by its <a lt="min main size property">min</a>/<a>max main size properties</a>.