[css-flexbox-1][editorial] Rephrase definition of max-content main size for clarity. w3c#6909

Author: tabatkins

css-flexbox-1/Overview.bs

@@ -2893,10 +2893,15 @@ Intrinsic Sizes</h3>
 Flex Container Intrinsic Main Sizes</h4>
 
 	The <strong><a>max-content</a> <a>main size</a> of a <a>flex container</a></strong>
-	is the smallest size the <a>flex container</a> can take
-	while maintaining the [[#intrinsic-item-contributions|max-content contributions]] of its <a>flex items</a>,
-	insofar as allowed by the items’ own flexibility.
-	Considering only non-[=collapsed=] [=flex items=]:
+	is, fundamentally, the smallest size the <a>flex container</a> can take
+	such that when flex layout is run with that container size,
+	each [=flex item=] ends up at least as large as
+	its [[#intrinsic-item-contributions|max-content contribution]],
+	to the extent allowed by the items’ flexibility.
+
+	It is calculated,
+	considering only non-[=collapsed=] [=flex items=],
+	by:
 
 	<ol>
 		<li>