[css-flexbox] Fix terminology error for max-content size of flex container per dholbert's message. <https://lists.w3.org/Archives/Public/www-style/2014Oct/0443.html>

Author: fantasai

css-flexbox/Overview.bs

@@ -2758,7 +2758,7 @@ Intrinsic Sizes</h3>
 	<ol>
 		<li>
 			For each <a>flex item</a>,
-			subtract its <a>flex basis</a> from its <a>max-content contribution</a> size,
+			subtract its <a>flex base size</a> from its <a>max-content contribution</a> size,
 			then divide by its <a>flex grow factor</a>, floored at 1,
 			or by its <a>scaled flex shrink factor</a> (if the result was negative, flooring the <a>flex shrink factor</a> at 1 if necessary).
 			This is the item's <var>max-content flex fraction</var>.