[css-sizing-4][editorial] Rephrase condition for readability.

Author: tabatkins

css-sizing-4/Overview.bs

@@ -344,8 +344,8 @@ Automatic Content-based Minimum Sizes</h4>
 	the <a>automatic minimum size</a> in the <a>ratio-dependent axis</a>
 	of a box with a <a>preferred aspect ratio</a>
 	that is neither a <a>replaced element</a> nor a <a>scroll container</a>
-	is the minimum of
-	its <a>min-content size</a> and its <a>maximum size</a>.
+	is its <a>min-content size</a>
+	clamped from above by its <a>maximum size</a>.
 
 	<div class="example">
 		In the following example,